IVGCVSW-3119 Rename MergerLayer to ConcatLayer

!android-nn-driver:1210

Change-Id: I940b3b9e421c92bfd55ae996f7bc54ac077f2604
Signed-off-by: Jim Flynn <jim.flynn@arm.com>
diff --git a/Android.mk b/Android.mk
index d57e486..f791c1a 100644
--- a/Android.mk
+++ b/Android.mk
@@ -91,6 +91,7 @@
         src/armnn/layers/AdditionLayer.cpp \
         src/armnn/layers/BatchNormalizationLayer.cpp \
         src/armnn/layers/BatchToSpaceNdLayer.cpp \
+        src/armnn/layers/ConcatLayer.cpp \
         src/armnn/layers/ConstantLayer.cpp \
         src/armnn/layers/Convolution2dLayer.cpp \
         src/armnn/layers/ConvertFp16ToFp32Layer.cpp \
@@ -114,7 +115,6 @@
         src/armnn/layers/MeanLayer.cpp \
         src/armnn/layers/MemCopyLayer.cpp \
         src/armnn/layers/MergeLayer.cpp \
-        src/armnn/layers/MergerLayer.cpp \
         src/armnn/layers/MinimumLayer.cpp \
         src/armnn/layers/MultiplicationLayer.cpp \
         src/armnn/layers/NormalizationLayer.cpp \
diff --git a/CMakeLists.txt b/CMakeLists.txt
index b6c9776..c9ca70e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -227,6 +227,8 @@
     src/armnn/layers/BatchNormalizationLayer.cpp
     src/armnn/layers/BatchToSpaceNdLayer.hpp
     src/armnn/layers/BatchToSpaceNdLayer.cpp
+    src/armnn/layers/ConcatLayer.hpp
+    src/armnn/layers/ConcatLayer.cpp
     src/armnn/layers/ConstantLayer.hpp
     src/armnn/layers/ConstantLayer.cpp
     src/armnn/layers/Convolution2dLayer.hpp
@@ -271,8 +273,6 @@
     src/armnn/layers/MemCopyLayer.cpp
     src/armnn/layers/MergeLayer.hpp
     src/armnn/layers/MergeLayer.cpp
-    src/armnn/layers/MergerLayer.hpp
-    src/armnn/layers/MergerLayer.cpp
     src/armnn/layers/MinimumLayer.cpp
     src/armnn/layers/MinimumLayer.hpp
     src/armnn/layers/MultiplicationLayer.hpp
diff --git a/include/armnn/Descriptors.hpp b/include/armnn/Descriptors.hpp
index dcbb8c4..25bf818 100644
--- a/include/armnn/Descriptors.hpp
+++ b/include/armnn/Descriptors.hpp
@@ -54,8 +54,8 @@
     float              m_Beta;
 };
 
-/// @brief An OriginsDescriptor for the MergerLayer.
-/// Descriptor to configure the merging process. Number of views must be equal to the number of inputs, and
+/// @brief An OriginsDescriptor for the ConcatLayer.
+/// Descriptor to configure the concatenation process. Number of views must be equal to the number of inputs, and
 /// their order must match - e.g. first view corresponds to the first input, second view to the second input, etc.
 struct OriginsDescriptor
 {
@@ -144,12 +144,12 @@
     return CreateDescriptorForConcatenation(first, last, concatenationDimension);
 }
 
-/// @brief Convenience template to create an OriginsDescriptor to use when creating a MergerLayer for performing
+/// @brief Convenience template to create an OriginsDescriptor to use when creating a ConcatLayer for performing
 /// concatenation of a number of input tensors.
 template <typename TensorShapeIt>
 OriginsDescriptor CreateDescriptorForConcatenation(TensorShapeIt first,
-                                                         TensorShapeIt last,
-                                                         unsigned int concatenationDimension)
+                                                   TensorShapeIt last,
+                                                   unsigned int concatenationDimension)
 {
     auto numInputs = std::distance(first, last);
 
diff --git a/include/armnn/DescriptorsFwd.hpp b/include/armnn/DescriptorsFwd.hpp
index affd6e2..4f47738 100644
--- a/include/armnn/DescriptorsFwd.hpp
+++ b/include/armnn/DescriptorsFwd.hpp
@@ -31,6 +31,8 @@
 struct StridedSliceDescriptor;
 struct ViewsDescriptor;
 
+// MergerDescriptor is deprecated use ConcatDescriptor instead
 using MergerDescriptor = OriginsDescriptor;
+using ConcatDescriptor = OriginsDescriptor;
 using SplitterDescriptor = ViewsDescriptor;
 }
diff --git a/include/armnn/ILayerVisitor.hpp b/include/armnn/ILayerVisitor.hpp
index 10d0cc6..cbddb2d 100644
--- a/include/armnn/ILayerVisitor.hpp
+++ b/include/armnn/ILayerVisitor.hpp
@@ -4,6 +4,7 @@
 //
 #pragma once
 
+#include <armnn/Deprecated.hpp>
 #include <armnn/DescriptorsFwd.hpp>
 #include <armnn/NetworkFwd.hpp>
 #include <armnn/Optional.hpp>
@@ -60,16 +61,19 @@
 
     /// Function that a concat layer should call back to when its Accept(ILayerVisitor&) function is invoked.
     /// @param layer - pointer to the layer which is calling back to this visit function.
-    /// @param mergerDescriptor - WindowsDescriptor to configure the concatenation process. Number of Views must be
-    ///                           equal to the number of inputs, and their order must match - e.g. first view
-    ///                           corresponds to the first input, second view to the second input, etc....
+    /// @param concatDescriptor - ConcatDescriptor (synonym for OriginsDescriptor) to configure the concatenation
+    ///                           process. Number of Views must be equal to the number of inputs, and their order
+    ///                           must match - e.g. first view corresponds to the first input, second view to the
+    ///                           second input, etc....
     /// @param name - Optional name for the layer.
     virtual void VisitConcatLayer(const IConnectableLayer* layer,
-                                  const OriginsDescriptor& mergerDescriptor,
+                                  const OriginsDescriptor& concatDescriptor,
                                   const char* name = nullptr)
     {
         // default implementation to ease transition while MergerLayer is being deprecated
-        VisitMergerLayer(layer, mergerDescriptor, name);
+        ARMNN_NO_DEPRECATE_WARN_BEGIN
+        VisitMergerLayer(layer, concatDescriptor, name);
+        ARMNN_NO_DEPRECATE_WARN_END
     }
 
     /// Function a layer with no inputs and a single output, which always corresponds to
@@ -221,13 +225,14 @@
 
     /// Function that a merger layer should call back to when its Accept(ILayerVisitor&) function is invoked.
     /// @param layer - pointer to the layer which is calling back to this visit function.
-    /// @param mergerDescriptor - WindowsDescriptor to configure the merging process. Number of Views must be equal to
-    ///                           the number of inputs, and their order must match - e.g. first view corresponds to
-    ///                           the first input, second view to the second input, etc....
+    /// @param mergerDescriptor - MergerDescriptor (synonym for OriginsDescriptor) to configure the concatenation
+    ///                           process. Number of Views must be equal to the number of inputs, and their order
+    ///                           must match - e.g. first view corresponds to the first input, second view to the
+    ///                           second input, etc....
     /// @param name - Optional name for the layer.
-    // NOTE: this method will be deprecated and replaced by VisitConcatLayer
+    ARMNN_DEPRECATED_MSG("Use VisitConcatLayer instead")
     virtual void VisitMergerLayer(const IConnectableLayer* layer,
-                                  const OriginsDescriptor& mergerDescriptor,
+                                  const MergerDescriptor& mergerDescriptor,
                                   const char* name = nullptr) = 0;
 
     /// Function a Minimum layer should call back to when its Accept(ILayerVisitor&) function is invoked.
@@ -333,7 +338,7 @@
 
     /// Function that a splitter layer should call back to when its Accept(ILayerVisitor&) function is invoked.
     /// @param layer - pointer to the layer which is calling back to this visit function.
-    /// @param splitterDescriptor - WindowsDescriptor to configure the splitting process.
+    /// @param splitterDescriptor - ViewsDescriptor to configure the splitting process.
     ///                             Number of Views must be equal to the number of outputs,
     ///                             and their order must match - e.g. first view corresponds to
     ///                             the first output, second view to the second output, etc....
diff --git a/include/armnn/INetwork.hpp b/include/armnn/INetwork.hpp
index ef85243..f3dfcd8 100644
--- a/include/armnn/INetwork.hpp
+++ b/include/armnn/INetwork.hpp
@@ -103,12 +103,13 @@
     virtual IConnectableLayer* AddInputLayer(LayerBindingId id, const char* name = nullptr) = 0;
 
     /// Adds a concatenation layer to the network.
-    /// @param mergerDescriptor - WindowsDescriptor to configure the concatenation process. Number of Views must
-    ///                           be equal to the number of inputs, and their order must match - e.g. first view
-    ///                           corresponds to the first input, second view to the second input, etc....
+    /// @param concatDescriptor - ConcatDescriptor (synonym for OriginsDescriptor) to configure the concatenation
+    ///                           process. Number of Views must be equal to the number of inputs, and their order
+    ///                           must match - e.g. first view corresponds to the first input, second view to the
+    ///                           second input, etc....
     /// @param name - Optional name for the layer.
     /// @return - Interface for configuring the layer.
-    virtual IConnectableLayer* AddConcatLayer(const OriginsDescriptor& mergerDescriptor,
+    virtual IConnectableLayer* AddConcatLayer(const ConcatDescriptor& concatDescriptor,
                                               const char* name = nullptr) = 0;
 
     /// Adds a 2D convolution layer to the network.
@@ -239,7 +240,7 @@
         const char* name = nullptr) = 0;
 
     /// Adds a splitter layer to the network.
-    /// @param splitterDescriptor - WindowsDescriptor to configure the splitting process.
+    /// @param splitterDescriptor - ViewsDescriptor to configure the splitting process.
     ///                             Number of Views must be equal to the number of outputs,
     ///                             and their order must match - e.g. first view corresponds to
     ///                             the first output, second view to the second output, etc....
@@ -253,14 +254,15 @@
     /// @return - Interface for configuring the layer.
     virtual IConnectableLayer* AddMergeLayer(const char* name = nullptr) = 0;
 
-    /// Adds a merger layer to the network.
-    /// @param mergerDescriptor - WindowsDescriptor to configure the merging process. Number of Views must be equal to
-    ///                           the number of inputs, and their order must match - e.g. first view corresponds to
-    ///                           the first input, second view to the second input, etc....
+    /// Adds a concat layer to the network.
+    /// @param mergerDescriptor - MergerDescriptor (synonym for OriginsDescriptor) to configure the concatenation
+    ///                           process. Number of Views must be equal to the number of inputs, and their order
+    ///                           must match - e.g. first view corresponds to the first input, second view to the
+    ///                           second input, etc....
     /// @param name - Optional name for the layer.
     /// @return - Interface for configuring the layer.
     ARMNN_DEPRECATED_MSG("Use AddConcatLayer instead")
-    virtual IConnectableLayer* AddMergerLayer(const OriginsDescriptor& mergerDescriptor,
+    virtual IConnectableLayer* AddMergerLayer(const MergerDescriptor& mergerDescriptor,
         const char* name = nullptr) = 0;
 
     /// Adds an addition layer to the network.
diff --git a/include/armnn/LayerVisitorBase.hpp b/include/armnn/LayerVisitorBase.hpp
index 657051f..47a8384 100644
--- a/include/armnn/LayerVisitorBase.hpp
+++ b/include/armnn/LayerVisitorBase.hpp
@@ -50,7 +50,7 @@
                                   const char*) override { DefaultPolicy::Apply(__func__); }
 
     void VisitConcatLayer(const IConnectableLayer*,
-                          const OriginsDescriptor&,
+                          const ConcatDescriptor&,
                           const char*) override { DefaultPolicy::Apply(__func__); }
 
     void VisitConstantLayer(const IConnectableLayer*,
@@ -122,7 +122,7 @@
                          const char*) override { DefaultPolicy::Apply(__func__); }
 
     void VisitMergerLayer(const IConnectableLayer*,
-                          const OriginsDescriptor&,
+                          const MergerDescriptor&,
                           const char*) override { DefaultPolicy::Apply(__func__); }
 
     void VisitMinimumLayer(const IConnectableLayer*,
diff --git a/include/armnn/Tensor.hpp b/include/armnn/Tensor.hpp
index 3cde1ad..b3a4629 100644
--- a/include/armnn/Tensor.hpp
+++ b/include/armnn/Tensor.hpp
@@ -3,6 +3,7 @@
 // SPDX-License-Identifier: MIT
 //
 #pragma once
+
 #include "TensorFwd.hpp"
 
 #include "Exceptions.hpp"
diff --git a/src/armnn/DynamicQuantizationVisitor.cpp b/src/armnn/DynamicQuantizationVisitor.cpp
index 9b33fb7..d4e0c90 100644
--- a/src/armnn/DynamicQuantizationVisitor.cpp
+++ b/src/armnn/DynamicQuantizationVisitor.cpp
@@ -242,8 +242,8 @@
     SetRange(layer, 0, min, max);
 }
 
-void DynamicQuantizationVisitor::VisitMergerLayer(const IConnectableLayer* layer,
-                                                  const OriginsDescriptor& mergerDescriptor,
+void DynamicQuantizationVisitor::VisitConcatLayer(const IConnectableLayer* layer,
+                                                  const ConcatDescriptor& originsDescriptor,
                                                   const char* name)
 {
     float min = std::numeric_limits<float>::max();
diff --git a/src/armnn/DynamicQuantizationVisitor.hpp b/src/armnn/DynamicQuantizationVisitor.hpp
index 6d430f1..43768fd 100644
--- a/src/armnn/DynamicQuantizationVisitor.hpp
+++ b/src/armnn/DynamicQuantizationVisitor.hpp
@@ -71,14 +71,14 @@
                            const SoftmaxDescriptor& softmaxDescriptor,
                            const char* name = nullptr) override;
 
+    void VisitConcatLayer(const IConnectableLayer* layer,
+                          const ConcatDescriptor& originsDescriptor,
+                          const char* name = nullptr) override;
+
     void VisitConstantLayer(const IConnectableLayer* layer,
                             const ConstTensor& input,
                             const char* name = nullptr) override;
 
-    void VisitMergerLayer(const IConnectableLayer* layer,
-                          const OriginsDescriptor& mergerDescriptor,
-                          const char* name = nullptr) override;
-
     void VisitReshapeLayer(const IConnectableLayer* layer,
                            const ReshapeDescriptor& reshapeDescriptor,
                            const char* name = nullptr) override;
diff --git a/src/armnn/InternalTypes.cpp b/src/armnn/InternalTypes.cpp
index a811706..47a6f60 100644
--- a/src/armnn/InternalTypes.cpp
+++ b/src/armnn/InternalTypes.cpp
@@ -18,6 +18,7 @@
         case LayerType::Addition: return "Addition";
         case LayerType::BatchNormalization: return "BatchNormalization";
         case LayerType::BatchToSpaceNd: return "BatchToSpaceNd";
+        case LayerType::Concat: return "Concat";
         case LayerType::Constant: return "Constant";
         case LayerType::ConvertFp16ToFp32: return "ConvertFp16ToFp32";
         case LayerType::ConvertFp32ToFp16: return "ConvertFp32ToFp16";
@@ -40,7 +41,6 @@
         case LayerType::Mean: return "Mean";
         case LayerType::MemCopy: return "MemCopy";
         case LayerType::Merge: return "Merge";
-        case LayerType::Merger: return "Merger";
         case LayerType::Minimum: return "Minimum";
         case LayerType::Multiplication: return "Multiplication";
         case LayerType::Normalization: return "Normalization";
diff --git a/src/armnn/InternalTypes.hpp b/src/armnn/InternalTypes.hpp
index 5765b5b..9a215e6 100644
--- a/src/armnn/InternalTypes.hpp
+++ b/src/armnn/InternalTypes.hpp
@@ -18,6 +18,7 @@
     Addition,
     BatchNormalization,
     BatchToSpaceNd,
+    Concat,
     Constant,
     ConvertFp16ToFp32,
     ConvertFp32ToFp16,
@@ -40,7 +41,6 @@
     Mean,
     MemCopy,
     Merge,
-    Merger,
     Minimum,
     Multiplication,
     Normalization,
diff --git a/src/armnn/LayerSupport.cpp b/src/armnn/LayerSupport.cpp
index 5867fab..5324e5f 100644
--- a/src/armnn/LayerSupport.cpp
+++ b/src/armnn/LayerSupport.cpp
@@ -137,9 +137,9 @@
                        char* reasonIfUnsupported,
                        size_t reasonIfUnsupportedMaxLength)
 {
-    ARMNN_NO_DEPRECATE_WARN_BEGIN
-    return IsMergerSupported(backend, inputs, output, descriptor, reasonIfUnsupported, reasonIfUnsupportedMaxLength);
-    ARMNN_NO_DEPRECATE_WARN_END
+    BOOST_ASSERT(inputs.size() > 0);
+
+    FORWARD_LAYER_SUPPORT_FUNC(backend, IsConcatSupported, inputs, output, descriptor);
 }
 
 bool IsConstantSupported(const BackendId& backend,
diff --git a/src/armnn/LayersFwd.hpp b/src/armnn/LayersFwd.hpp
index 31cfa66..40330f2 100644
--- a/src/armnn/LayersFwd.hpp
+++ b/src/armnn/LayersFwd.hpp
@@ -10,6 +10,7 @@
 #include "layers/AdditionLayer.hpp"
 #include "layers/BatchNormalizationLayer.hpp"
 #include "layers/BatchToSpaceNdLayer.hpp"
+#include "layers/ConcatLayer.hpp"
 #include "layers/ConstantLayer.hpp"
 #include "layers/ConvertFp16ToFp32Layer.hpp"
 #include "layers/ConvertFp32ToFp16Layer.hpp"
@@ -32,7 +33,6 @@
 #include "layers/MeanLayer.hpp"
 #include "layers/MemCopyLayer.hpp"
 #include "layers/MergeLayer.hpp"
-#include "layers/MergerLayer.hpp"
 #include "layers/MinimumLayer.hpp"
 #include "layers/MultiplicationLayer.hpp"
 #include "layers/NormalizationLayer.hpp"
@@ -83,6 +83,7 @@
 DECLARE_LAYER(Addition)
 DECLARE_LAYER(BatchNormalization)
 DECLARE_LAYER(BatchToSpaceNd)
+DECLARE_LAYER(Concat)
 DECLARE_LAYER(Constant)
 DECLARE_LAYER(ConvertFp16ToFp32)
 DECLARE_LAYER(ConvertFp32ToFp16)
@@ -105,7 +106,6 @@
 DECLARE_LAYER(Mean)
 DECLARE_LAYER(MemCopy)
 DECLARE_LAYER(Merge)
-DECLARE_LAYER(Merger)
 DECLARE_LAYER(Minimum)
 DECLARE_LAYER(Multiplication)
 DECLARE_LAYER(Normalization)
diff --git a/src/armnn/LoadedNetwork.cpp b/src/armnn/LoadedNetwork.cpp
index 7f00dbe..3c7dfb0 100644
--- a/src/armnn/LoadedNetwork.cpp
+++ b/src/armnn/LoadedNetwork.cpp
@@ -82,7 +82,7 @@
     //First create tensor handlers, backends and workload factories.
     //Handlers are created before workloads are.
     //Because workload creation can modify some of the handlers,
-    //(for example the splitter and merger layers).
+    //(for example the splitter and concat layers).
     for (auto&& layer : order)
     {
         auto const& backend = layer->GetBackendId();
diff --git a/src/armnn/Network.cpp b/src/armnn/Network.cpp
index b80e0e7..6bd365b 100644
--- a/src/armnn/Network.cpp
+++ b/src/armnn/Network.cpp
@@ -603,12 +603,10 @@
     return AddFullyConnectedLayerImpl(fullyConnectedDescriptor, weights, optionalBiases, name);
 }
 
-IConnectableLayer* Network::AddConcatLayer(const OriginsDescriptor& mergerDescriptor,
+IConnectableLayer* Network::AddConcatLayer(const ConcatDescriptor& concatDescriptor,
                                            const char* name)
 {
-    ARMNN_NO_DEPRECATE_WARN_BEGIN
-    return AddMergerLayer(mergerDescriptor, name);
-    ARMNN_NO_DEPRECATE_WARN_END
+    return m_Graph->AddLayer<ConcatLayer>(concatDescriptor, name);
 }
 
 IConnectableLayer* Network::AddConvolution2dLayerImpl(const Convolution2dDescriptor& convolution2dDescriptor,
@@ -766,10 +764,10 @@
     return m_Graph->AddLayer<MinimumLayer>(name);
 }
 
-IConnectableLayer* Network::AddMergerLayer(const OriginsDescriptor& mergerDescriptor,
+IConnectableLayer* Network::AddMergerLayer(const MergerDescriptor& mergerDescriptor,
                                            const char* name)
 {
-    return m_Graph->AddLayer<MergerLayer>(mergerDescriptor, name);
+    return AddConcatLayer(mergerDescriptor, name);
 }
 
 IConnectableLayer* Network::AddAdditionLayer(const char* name)
diff --git a/src/armnn/Network.hpp b/src/armnn/Network.hpp
index d26c286..52a2714 100644
--- a/src/armnn/Network.hpp
+++ b/src/armnn/Network.hpp
@@ -37,7 +37,7 @@
     IConnectableLayer* AddBatchToSpaceNdLayer(const BatchToSpaceNdDescriptor& batchToSpaceNdDescriptor,
                                               const char* name = nullptr) override;
 
-    IConnectableLayer* AddConcatLayer(const OriginsDescriptor& mergerDescriptor,
+    IConnectableLayer* AddConcatLayer(const ConcatDescriptor& concatDescriptor,
                                       const char* name = nullptr) override;
 
     IConnectableLayer* AddConvolution2dLayer(const Convolution2dDescriptor& convolution2dDescriptor,
@@ -119,7 +119,7 @@
         const char* name = nullptr) override;
 
     ARMNN_DEPRECATED_MSG("Use AddConcatLayer instead")
-    IConnectableLayer* AddMergerLayer(const OriginsDescriptor& mergerDescriptor,
+    IConnectableLayer* AddMergerLayer(const MergerDescriptor& mergerDescriptor,
                                       const char* name = nullptr) override;
 
     IConnectableLayer* AddAdditionLayer(const char* name = nullptr) override;
diff --git a/src/armnn/QuantizerVisitor.cpp b/src/armnn/QuantizerVisitor.cpp
index f30ab52..47ddc4e 100644
--- a/src/armnn/QuantizerVisitor.cpp
+++ b/src/armnn/QuantizerVisitor.cpp
@@ -122,6 +122,15 @@
     SetQuantizedInputConnections(layer, newLayer);
 }
 
+void QuantizerVisitor::VisitConcatLayer(const IConnectableLayer* layer,
+                                        const OriginsDescriptor& originsDescriptor,
+                                        const char* name)
+{
+    IConnectableLayer* newLayer = m_QuantizedNetwork->AddConcatLayer(originsDescriptor, name);
+    RecordLayer(layer, newLayer);
+    SetQuantizedInputConnections(layer, newLayer);
+}
+
 void QuantizerVisitor::VisitConstantLayer(const IConnectableLayer* layer,
                                           const ConstTensor& input,
                                           const char* name)
@@ -238,15 +247,6 @@
     SetQuantizedInputConnections(layer, newLayer);
 }
 
-void QuantizerVisitor::VisitMergerLayer(const IConnectableLayer* layer,
-                                        const OriginsDescriptor& mergerDescriptor,
-                                        const char* name)
-{
-    IConnectableLayer* newLayer = m_QuantizedNetwork->AddConcatLayer(mergerDescriptor, name);
-    RecordLayer(layer, newLayer);
-    SetQuantizedInputConnections(layer, newLayer);
-}
-
 void QuantizerVisitor::VisitMultiplicationLayer(const IConnectableLayer* layer,
                                                 const char* name)
 {
diff --git a/src/armnn/QuantizerVisitor.hpp b/src/armnn/QuantizerVisitor.hpp
index 5d00e31..6e5609d 100644
--- a/src/armnn/QuantizerVisitor.hpp
+++ b/src/armnn/QuantizerVisitor.hpp
@@ -50,6 +50,10 @@
                                   const BatchToSpaceNdDescriptor& batchToSpaceNdDescriptor,
                                   const char* name = nullptr) override;
 
+    void VisitConcatLayer(const IConnectableLayer* layer,
+                          const OriginsDescriptor& originsDescriptor,
+                          const char* name = nullptr) override;
+
     void VisitConstantLayer(const IConnectableLayer* layer,
                             const ConstTensor& input,
                             const char* name = nullptr) override;
@@ -78,10 +82,6 @@
                           const MeanDescriptor& meanDescriptor,
                           const char* name = nullptr) override;
 
-    void VisitMergerLayer(const IConnectableLayer* layer,
-                          const OriginsDescriptor& mergerDescriptor,
-                          const char* name = nullptr) override;
-
     void VisitMultiplicationLayer(const IConnectableLayer* layer,
                                   const char* name = nullptr) override;
 
diff --git a/src/armnn/StaticRangeVisitor.cpp b/src/armnn/StaticRangeVisitor.cpp
index 815730b..d437a99 100644
--- a/src/armnn/StaticRangeVisitor.cpp
+++ b/src/armnn/StaticRangeVisitor.cpp
@@ -152,6 +152,24 @@
     SetRange(layer, 0, 0.f, 1.f);
 }
 
+void StaticRangeVisitor::VisitConcatLayer(const IConnectableLayer* layer,
+                                          const OriginsDescriptor& originsDescriptor,
+                                          const char* name)
+{
+    float min = std::numeric_limits<float>::max();
+    float max = std::numeric_limits<float>::lowest();
+    for (unsigned int i = 0; i < layer->GetNumInputSlots(); ++i)
+    {
+        const IOutputSlot* outputSlot = layer->GetInputSlot(i).GetConnection();
+        LayerGuid layerId = outputSlot->GetOwningLayerGuid();
+        unsigned int slotIndex = outputSlot->CalculateIndexOnOwner();
+        RangeTracker::MinMaxRange range = m_RangeTracker.GetRange(layerId, slotIndex);
+        min = std::min(min, range.first);
+        max = std::max(max, range.second);
+    }
+    SetRange(layer, 0, min, max);
+}
+
 void StaticRangeVisitor::VisitConstantLayer(const IConnectableLayer* layer,
                                             const ConstTensor& input,
                                             const char* name)
@@ -180,24 +198,6 @@
     SetRange(layer, 0, min, max);
 }
 
-void StaticRangeVisitor::VisitMergerLayer(const IConnectableLayer* layer,
-                                          const OriginsDescriptor& mergerDescriptor,
-                                          const char* name)
-{
-    float min = std::numeric_limits<float>::max();
-    float max = std::numeric_limits<float>::lowest();
-    for (unsigned int i = 0; i < layer->GetNumInputSlots(); ++i)
-    {
-        const IOutputSlot* outputSlot = layer->GetInputSlot(i).GetConnection();
-        LayerGuid layerId = outputSlot->GetOwningLayerGuid();
-        unsigned int slotIndex = outputSlot->CalculateIndexOnOwner();
-        RangeTracker::MinMaxRange range = m_RangeTracker.GetRange(layerId, slotIndex);
-        min = std::min(min, range.first);
-        max = std::max(max, range.second);
-    }
-    SetRange(layer, 0, min, max);
-}
-
 void StaticRangeVisitor::VisitReshapeLayer(const IConnectableLayer* layer,
                                            const ReshapeDescriptor& reshapeDescriptor,
                                            const char* name)
diff --git a/src/armnn/StaticRangeVisitor.hpp b/src/armnn/StaticRangeVisitor.hpp
index 8f2e698..a393a8e 100644
--- a/src/armnn/StaticRangeVisitor.hpp
+++ b/src/armnn/StaticRangeVisitor.hpp
@@ -71,14 +71,14 @@
                            const SoftmaxDescriptor& softmaxDescriptor,
                            const char* name = nullptr) override;
 
+    void VisitConcatLayer(const IConnectableLayer* layer,
+                          const OriginsDescriptor& originsDescriptor,
+                          const char* name = nullptr) override;
+
     void VisitConstantLayer(const IConnectableLayer* layer,
                             const ConstTensor& input,
                             const char* name = nullptr) override;
 
-    void VisitMergerLayer(const IConnectableLayer* layer,
-                          const OriginsDescriptor& mergerDescriptor,
-                          const char* name = nullptr) override;
-
     void VisitReshapeLayer(const IConnectableLayer* layer,
                            const ReshapeDescriptor& reshapeDescriptor,
                            const char* name = nullptr) override;
diff --git a/src/armnn/layers/MergerLayer.cpp b/src/armnn/layers/ConcatLayer.cpp
similarity index 81%
rename from src/armnn/layers/MergerLayer.cpp
rename to src/armnn/layers/ConcatLayer.cpp
index 9dbfdcc..1d2641c 100644
--- a/src/armnn/layers/MergerLayer.cpp
+++ b/src/armnn/layers/ConcatLayer.cpp
@@ -2,7 +2,7 @@
 // Copyright © 2017 Arm Ltd. All rights reserved.
 // SPDX-License-Identifier: MIT
 //
-#include "MergerLayer.hpp"
+#include "ConcatLayer.hpp"
 #include "LayerCloneBase.hpp"
 
 #include <armnn/TypesUtils.hpp>
@@ -14,14 +14,14 @@
 namespace armnn
 {
 
-MergerLayer::MergerLayer(const OriginsDescriptor& param, const char* name)
-    : LayerWithParameters(param.GetNumViews(), 1, LayerType::Merger, param, name)
+ConcatLayer::ConcatLayer(const OriginsDescriptor& param, const char* name)
+    : LayerWithParameters(param.GetNumViews(), 1, LayerType::Concat, param, name)
 {
 }
 
-std::unique_ptr<IWorkload> MergerLayer::CreateWorkload(const Graph& graph, const IWorkloadFactory& factory) const
+std::unique_ptr<IWorkload> ConcatLayer::CreateWorkload(const Graph& graph, const IWorkloadFactory& factory) const
 {
-    MergerQueueDescriptor descriptor;
+    ConcatQueueDescriptor descriptor;
 
     // Copies the view origins to the descriptor.
     descriptor.m_ViewOrigins.reserve(m_Param.GetNumViews());
@@ -34,24 +34,24 @@
     return factory.CreateConcat(descriptor, PrepInfoAndDesc(descriptor, graph));
 }
 
-void MergerLayer::CreateTensorHandles(Graph& graph, const IWorkloadFactory& factory)
+void ConcatLayer::CreateTensorHandles(Graph& graph, const IWorkloadFactory& factory)
 {
-    //If sub tensors are supported then the merger
+    //If sub tensors are supported then the concat
     //just needs to make sure that the outputs of the prev layer
-    //are made subtensors of the output of the merger layer.
+    //are made subtensors of the output of the concat layer.
     m_OutputHandlers[0].CreateTensorHandles(factory);
 
     if (factory.SupportsSubTensors())
     {
-        std::queue<MergerLayer*> m_MergerLayers;
+        std::queue<ConcatLayer*> m_ConcatLayers;
 
-        m_MergerLayers.push(this);
-        while (!m_MergerLayers.empty())
+        m_ConcatLayers.push(this);
+        while (!m_ConcatLayers.empty())
         {
-            MergerLayer* currentLayer = m_MergerLayers.front();
+            ConcatLayer* currentLayer = m_ConcatLayers.front();
             ITensorHandle* parentTensor = currentLayer->GetOutputHandler(0).GetData();
             const TensorInfo& parentInfo = currentLayer->GetOutputHandler(0).GetTensorInfo();
-            m_MergerLayers.pop();
+            m_ConcatLayers.pop();
 
             const unsigned int numInputSlots = currentLayer->GetNumInputSlots();
 
@@ -99,14 +99,14 @@
                 OutputSlot* slot = currentLayer->GetInputSlot(i).GetConnectedOutputSlot();
                 OutputHandler& outputHandler = slot->GetOutputHandler();
 
-                BOOST_ASSERT_MSG(subTensor, "MergerLayer: Expected a valid sub-tensor for substitution.");
+                BOOST_ASSERT_MSG(subTensor, "ConcatLayer: Expected a valid sub-tensor for substitution.");
                 outputHandler.SetData(std::move(subTensor));
 
                 Layer& inputLayer = slot->GetOwningLayer();
-                if (inputLayer.GetType() == LayerType::Merger)
+                if (inputLayer.GetType() == LayerType::Concat)
                 {
-                    // Continue with the substitution if the connected inputs are also merger layers
-                    m_MergerLayers.push(boost::polymorphic_downcast<MergerLayer*>(&inputLayer));
+                    // Continue with the substitution if the connected inputs are also concat layers
+                    m_ConcatLayers.push(boost::polymorphic_downcast<ConcatLayer*>(&inputLayer));
                 }
                 ++i;
             }
@@ -114,12 +114,12 @@
     }
 }
 
-MergerLayer* MergerLayer::Clone(Graph& graph) const
+ConcatLayer* ConcatLayer::Clone(Graph& graph) const
 {
-    return CloneBase<MergerLayer>(graph, m_Param, GetName());
+    return CloneBase<ConcatLayer>(graph, m_Param, GetName());
 }
 
-std::vector<TensorShape> MergerLayer::InferOutputShapes(const std::vector<TensorShape>& inputShapes) const
+std::vector<TensorShape> ConcatLayer::InferOutputShapes(const std::vector<TensorShape>& inputShapes) const
 {
     BOOST_ASSERT(inputShapes.size() == m_Param.GetNumViews());
 
@@ -129,7 +129,7 @@
         auto& inputShape = inputShapes[i];
 
         ConditionalThrowIfNotEqual<LayerValidationException>(
-            "MergerLayer: Num Dimensions must match all inputs.",
+            "ConcatLayer: Num Dimensions must match all inputs.",
             numDims,
             inputShape.GetNumDimensions());
     }
@@ -151,7 +151,7 @@
     // Checks that the bounding box starts at the origin.
     if (!std::all_of(extentMin.begin(), extentMin.end(), [](unsigned int s) { return s == 0; }))
     {
-        throw LayerValidationException("MergerLayer: there is no view that starts at the origin");
+        throw LayerValidationException("ConcatLayer: there is no view that starts at the origin");
     }
 
     // Checks that there are no overlaps of views (this would lead to undefined output at those locations).
@@ -182,7 +182,7 @@
             }
             if (allAxesOverlap)
             {
-                throw LayerValidationException("MergerLayer: Some views overlap.");
+                throw LayerValidationException("ConcatLayer: Some views overlap.");
             }
         }
     }
@@ -202,18 +202,18 @@
     }
 
     ConditionalThrowIfNotEqual<LayerValidationException>(
-        "MergerLayer: there are some gaps between views",
+        "ConcatLayer: there are some gaps between views",
         totalViewsVolume,
         outputVolume);
 
     return std::vector<TensorShape>({ TensorShape({numDims, extentMax.data()}) });
 }
 
-void MergerLayer::ValidateTensorShapesFromInputs()
+void ConcatLayer::ValidateTensorShapesFromInputs()
 {
-    // Validates Merger layer.
+    // Validates Concat layer.
     ConditionalThrowIfNotEqual<LayerValidationException>(
-        "MergerLayer: Num Inputs must match num views.",
+        "ConcatLayer: Num Inputs must match num views.",
         m_Param.GetNumViews(),
         GetNumInputSlots());
 
@@ -230,14 +230,14 @@
     BOOST_ASSERT(inferredShapes.size() == 1);
 
     ConditionalThrowIfNotEqual<LayerValidationException>(
-        "MergerLayer: TensorShape set on OutputSlot[0] does not match the inferred shape.",
+        "ConcatLayer: TensorShape set on OutputSlot[0] does not match the inferred shape.",
         GetOutputSlot(0).GetTensorInfo().GetShape(),
         inferredShapes[0]);
 }
 
-void MergerLayer::Accept(ILayerVisitor& visitor) const
+void ConcatLayer::Accept(ILayerVisitor& visitor) const
 {
-    visitor.VisitMergerLayer(this, GetParameters(), GetName());
+    visitor.VisitConcatLayer(this, GetParameters(), GetName());
 }
 
 } // namespace armnn armnn
diff --git a/src/armnn/layers/ConcatLayer.hpp b/src/armnn/layers/ConcatLayer.hpp
new file mode 100644
index 0000000..4268291
--- /dev/null
+++ b/src/armnn/layers/ConcatLayer.hpp
@@ -0,0 +1,55 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+#pragma once
+
+#include "LayerWithParameters.hpp"
+
+namespace armnn
+{
+
+/// This layer represents a merge operation.
+class ConcatLayer : public LayerWithParameters<OriginsDescriptor>
+{
+public:
+    /// Makes a workload for the Concat type.
+    /// @param [in] graph The graph where this layer can be found.
+    /// @param [in] factory The workload factory which will create the workload.
+    /// @return A pointer to the created workload, or nullptr if not created.
+    virtual std::unique_ptr<IWorkload> CreateWorkload(const Graph&            graph,
+                                                      const IWorkloadFactory& factory) const override;
+
+    /// Set the outputs to be appropriate sub tensors of the input if sub tensors are supported
+    /// otherwise creates tensor handlers.
+    /// @param [in] graph The graph where this layer can be found.
+    /// @param [in] factory The workload factory which will create the workload.
+    virtual void CreateTensorHandles(Graph& graph, const IWorkloadFactory& factory) override;
+
+    /// Creates a dynamically-allocated copy of this layer.
+    /// @param [in] graph The graph into which this layer is being cloned.
+    ConcatLayer* Clone(Graph& graph) const override;
+
+    /// Check if the input tensor shape(s)
+    /// will lead to a valid configuration of @ref ConcatLayer.
+    void ValidateTensorShapesFromInputs() override;
+
+    /// By default returns inputShapes if the number of inputs are equal to number of outputs,
+    /// otherwise infers the output shapes from given input shapes and layer properties.
+    /// @param [in] inputShapes The input shapes layer has.
+    /// @return A vector to the inferred output shape.
+    std::vector<TensorShape> InferOutputShapes(const std::vector<TensorShape>& inputShapes) const override;
+
+    void Accept(ILayerVisitor& visitor) const override;
+
+protected:
+    /// Constructor to create a ConcatLayer.
+    /// @param [in] param OriginsDescriptor to configure the concat operation.
+    /// @param [in] name Optional name for the layer.
+    ConcatLayer(const OriginsDescriptor& param, const char* name);
+
+    /// Default destructor
+    ~ConcatLayer() = default;
+};
+
+} // namespace
diff --git a/src/armnn/layers/MergerLayer.hpp b/src/armnn/layers/MergerLayer.hpp
index 6f0c148..3271060 100644
--- a/src/armnn/layers/MergerLayer.hpp
+++ b/src/armnn/layers/MergerLayer.hpp
@@ -4,52 +4,6 @@
 //
 #pragma once
 
-#include "LayerWithParameters.hpp"
+#include "ConcatLayer.hpp"
 
-namespace armnn
-{
-
-/// This layer represents a merge operation.
-class MergerLayer : public LayerWithParameters<OriginsDescriptor>
-{
-public:
-    /// Makes a workload for the Merger type.
-    /// @param [in] graph The graph where this layer can be found.
-    /// @param [in] factory The workload factory which will create the workload.
-    /// @return A pointer to the created workload, or nullptr if not created.
-    virtual std::unique_ptr<IWorkload> CreateWorkload(const Graph&            graph,
-                                                      const IWorkloadFactory& factory) const override;
-
-    /// Set the outputs to be appropriate sub tensors of the input if sub tensors are supported
-    /// otherwise creates tensor handlers.
-    /// @param [in] graph The graph where this layer can be found.
-    /// @param [in] factory The workload factory which will create the workload.
-    virtual void CreateTensorHandles(Graph& graph, const IWorkloadFactory& factory) override;
-
-    /// Creates a dynamically-allocated copy of this layer.
-    /// @param [in] graph The graph into which this layer is being cloned.
-    MergerLayer* Clone(Graph& graph) const override;
-
-    /// Check if the input tensor shape(s)
-    /// will lead to a valid configuration of @ref MergerLayer.
-    void ValidateTensorShapesFromInputs() override;
-
-    /// By default returns inputShapes if the number of inputs are equal to number of outputs,
-    /// otherwise infers the output shapes from given input shapes and layer properties.
-    /// @param [in] inputShapes The input shapes layer has.
-    /// @return A vector to the inferred output shape.
-    std::vector<TensorShape> InferOutputShapes(const std::vector<TensorShape>& inputShapes) const override;
-
-    void Accept(ILayerVisitor& visitor) const override;
-
-protected:
-    /// Constructor to create a MergerLayer.
-    /// @param [in] param OriginsDescriptor to configure the merger operation.
-    /// @param [in] name Optional name for the layer.
-    MergerLayer(const OriginsDescriptor& param, const char* name);
-
-    /// Default destructor
-    ~MergerLayer() = default;
-};
-
-} // namespace
+using MergerLayer = ConcatLayer;
\ No newline at end of file
diff --git a/src/armnn/test/CreateWorkload.hpp b/src/armnn/test/CreateWorkload.hpp
index be52ead..135a442 100644
--- a/src/armnn/test/CreateWorkload.hpp
+++ b/src/armnn/test/CreateWorkload.hpp
@@ -706,10 +706,10 @@
     return workload;
 }
 
-/// This function constructs a graph with both a splitter and a merger, and returns a pair of the workloads.
-template<typename SplitterWorkload, typename MergerWorkload, armnn::DataType DataType>
-std::pair<std::unique_ptr<SplitterWorkload>, std::unique_ptr<MergerWorkload>>
-    CreateSplitterMergerWorkloadTest(armnn::IWorkloadFactory& factory, armnn::Graph& graph)
+/// This function constructs a graph with both a splitter and a concat, and returns a pair of the workloads.
+template<typename SplitterWorkload, typename ConcatWorkload, armnn::DataType DataType>
+std::pair<std::unique_ptr<SplitterWorkload>, std::unique_ptr<ConcatWorkload>>
+    CreateSplitterConcatWorkloadTest(armnn::IWorkloadFactory &factory, armnn::Graph &graph)
 {
     armnn::TensorInfo inputTensorInfo({ 1, 2, 100, 10 }, DataType);
 
@@ -733,41 +733,41 @@
     Layer* const splitter = graph.AddLayer<SplitterLayer>(splitterViews, "splitter");
     BOOST_TEST_CHECKPOINT("created splitter layer");
 
-    armnn::OriginsDescriptor mergerViews(2);
-    mergerViews.SetViewOriginCoord(0, 0, 0);
-    mergerViews.SetViewOriginCoord(0, 1, 1);
-    mergerViews.SetViewOriginCoord(0, 2, 0);
-    mergerViews.SetViewOriginCoord(0, 3, 0);
+    armnn::OriginsDescriptor concatViews(2);
+    concatViews.SetViewOriginCoord(0, 0, 0);
+    concatViews.SetViewOriginCoord(0, 1, 1);
+    concatViews.SetViewOriginCoord(0, 2, 0);
+    concatViews.SetViewOriginCoord(0, 3, 0);
 
-    mergerViews.SetViewOriginCoord(1, 0, 0);
-    mergerViews.SetViewOriginCoord(1, 1, 0);
-    mergerViews.SetViewOriginCoord(1, 2, 0);
-    mergerViews.SetViewOriginCoord(1, 3, 0);
+    concatViews.SetViewOriginCoord(1, 0, 0);
+    concatViews.SetViewOriginCoord(1, 1, 0);
+    concatViews.SetViewOriginCoord(1, 2, 0);
+    concatViews.SetViewOriginCoord(1, 3, 0);
 
-    Layer* const merger = graph.AddLayer<MergerLayer>(mergerViews, "merger");
-    BOOST_TEST_CHECKPOINT("created merger layer");
+    Layer* const concat = graph.AddLayer<ConcatLayer>(concatViews, "concat");
+    BOOST_TEST_CHECKPOINT("created concat layer");
 
     Layer* const output = graph.AddLayer<OutputLayer>(0, "output");
 
     // Adds connections.
     Connect(input, splitter, inputTensorInfo, 0, 0);
     BOOST_TEST_CHECKPOINT("connect input to splitter");
-    Connect(splitter, merger, splitTensorInfo1, 0, 1); // The splitter & merger are connected up.
-    BOOST_TEST_CHECKPOINT("connect splitter[0] to merger[1]");
-    Connect(splitter, merger, splitTensorInfo2, 1, 0); // So that the outputs are flipped round.
-    BOOST_TEST_CHECKPOINT("connect splitter[1] to merger[0]");
-    Connect(merger, output, inputTensorInfo, 0, 0);
-    BOOST_TEST_CHECKPOINT("connect merger to output");
+    Connect(splitter, concat, splitTensorInfo1, 0, 1); // The splitter & concat are connected up.
+    BOOST_TEST_CHECKPOINT("connect splitter[0] to concat[1]");
+    Connect(splitter, concat, splitTensorInfo2, 1, 0); // So that the outputs are flipped round.
+    BOOST_TEST_CHECKPOINT("connect splitter[1] to concat[0]");
+    Connect(concat, output, inputTensorInfo, 0, 0);
+    BOOST_TEST_CHECKPOINT("connect concat to output");
 
     CreateTensorHandles(graph, factory);
     BOOST_TEST_CHECKPOINT("created tensor handles");
 
     auto workloadSplitter = MakeAndCheckWorkload<SplitterWorkload>(*splitter, graph, factory);
     BOOST_TEST_CHECKPOINT("created splitter workload");
-    auto workloadMerger = MakeAndCheckWorkload<MergerWorkload>(*merger, graph, factory);
-    BOOST_TEST_CHECKPOINT("created merger workload");
+    auto workloadConcat = MakeAndCheckWorkload<ConcatWorkload>(*concat, graph, factory);
+    BOOST_TEST_CHECKPOINT("created concat workload");
 
-    return {std::move(workloadSplitter), std::move(workloadMerger)};
+    return {std::move(workloadSplitter), std::move(workloadConcat)};
 }
 
 
@@ -1053,10 +1053,10 @@
     return workload;
 }
 
-template<typename MergerWorkload, armnn::DataType DataType>
-std::unique_ptr<MergerWorkload> CreateMergerWorkloadTest(armnn::IWorkloadFactory& factory,
-                                                         armnn::Graph& graph,
-                                                         const armnn::TensorShape& outputShape,
+template<typename ConcatWorkload, armnn::DataType DataType>
+std::unique_ptr<ConcatWorkload> CreateConcatWorkloadTest(armnn::IWorkloadFactory &factory,
+                                                         armnn::Graph &graph,
+                                                         const armnn::TensorShape &outputShape,
                                                          unsigned int concatAxis)
 {
     armnn::TensorInfo inputTensorInfo({ 2, 3, 2, 5 }, DataType);
@@ -1073,26 +1073,26 @@
                                                   inputShapes.end(),
                                                   concatAxis);
 
-    Layer* const merger = graph.AddLayer<MergerLayer>(descriptor, "merger");
-    BOOST_TEST_CHECKPOINT("created merger layer");
+    Layer* const concat = graph.AddLayer<ConcatLayer>(descriptor, "concat");
+    BOOST_TEST_CHECKPOINT("created concat layer");
 
     Layer* const output = graph.AddLayer<OutputLayer>(0, "output");
 
     // Adds connections.
-    Connect(input0, merger, inputTensorInfo, 0, 0);
-    BOOST_TEST_CHECKPOINT("connect input0 to merger");
-    Connect(input1, merger, inputTensorInfo, 0, 1);
-    BOOST_TEST_CHECKPOINT("connect input1 to merger");
-    Connect(merger, output, outputTensorInfo, 0, 0);
-    BOOST_TEST_CHECKPOINT("connect merger to output");
+    Connect(input0, concat, inputTensorInfo, 0, 0);
+    BOOST_TEST_CHECKPOINT("connect input0 to concat");
+    Connect(input1, concat, inputTensorInfo, 0, 1);
+    BOOST_TEST_CHECKPOINT("connect input1 to concat");
+    Connect(concat, output, outputTensorInfo, 0, 0);
+    BOOST_TEST_CHECKPOINT("connect concat to output");
 
     CreateTensorHandles(graph, factory);
     BOOST_TEST_CHECKPOINT("created tensor handles");
 
-    auto workloadMerger = MakeAndCheckWorkload<MergerWorkload>(*merger, graph, factory);
-    BOOST_TEST_CHECKPOINT("created merger workload");
+    auto workloadConcat = MakeAndCheckWorkload<ConcatWorkload>(*concat, graph, factory);
+    BOOST_TEST_CHECKPOINT("created concat workload");
 
-    return std::move(workloadMerger);
+    return std::move(workloadConcat);
 }
 
 template <typename PreCompiledWorkload, armnn::DataType dataType>
diff --git a/src/armnn/test/GraphTests.cpp b/src/armnn/test/GraphTests.cpp
index cca4653..0777d98 100644
--- a/src/armnn/test/GraphTests.cpp
+++ b/src/armnn/test/GraphTests.cpp
@@ -454,18 +454,18 @@
 
         convLayer1->GetOutputSlot(0).Connect(convLayer2->GetInputSlot(0));
 
-        armnn::OriginsDescriptor mergerDefaults(2);
-        Layer* const mergerLayer = AddLayer<MergerLayer>(mergerDefaults, "merger");
-        mergerLayer->SetBackendId(armnn::Compute::CpuRef);
+        armnn::OriginsDescriptor concatDefaults(2);
+        Layer* const concatLayer = AddLayer<ConcatLayer>(concatDefaults, "concat");
+        concatLayer->SetBackendId(armnn::Compute::CpuRef);
 
-        convLayer1->GetOutputSlot(0).Connect(mergerLayer->GetInputSlot(0));
-        convLayer2->GetOutputSlot(0).Connect(mergerLayer->GetInputSlot(1));
+        convLayer1->GetOutputSlot(0).Connect(concatLayer->GetInputSlot(0));
+        convLayer2->GetOutputSlot(0).Connect(concatLayer->GetInputSlot(1));
 
         armnn::ActivationDescriptor activationDefaults;
         Layer* const actLayer = AddLayer<ActivationLayer>(activationDefaults, "act");
         actLayer->SetBackendId(armnn::Compute::CpuRef);
 
-        mergerLayer->GetOutputSlot(0).Connect(actLayer->GetInputSlot(0));
+        concatLayer->GetOutputSlot(0).Connect(actLayer->GetInputSlot(0));
 
         armnn::SoftmaxDescriptor softmaxDefaults;
         Layer* const softmaxLayer = AddLayer<SoftmaxLayer>(softmaxDefaults, "softmax");
diff --git a/src/armnn/test/NetworkTests.cpp b/src/armnn/test/NetworkTests.cpp
index 47fd67b..14b67a1 100644
--- a/src/armnn/test/NetworkTests.cpp
+++ b/src/armnn/test/NetworkTests.cpp
@@ -226,7 +226,7 @@
     checkOneOutputToOneInputConnection(multiplicationLayer, outputLayer, 2, 0);
 }
 
-BOOST_AUTO_TEST_CASE(NetworkModification_SplitterMerger)
+BOOST_AUTO_TEST_CASE(NetworkModification_SplitterConcat)
 {
     armnn::Network net;
 
@@ -255,22 +255,20 @@
 
     splitterLayer->GetOutputSlot(1).Connect(softmaxLayer2->GetInputSlot(0));
 
-    // Adds a merger layer.
-    armnn::OriginsDescriptor mergerDesc(2, 4);
+    // Adds a concat layer.
+    armnn::OriginsDescriptor concatDesc(2, 4);
 
-    ARMNN_NO_DEPRECATE_WARN_BEGIN
-    armnn::IConnectableLayer* mergerLayer = net.AddMergerLayer(mergerDesc, "merger layer");
-    ARMNN_NO_DEPRECATE_WARN_END
-    BOOST_TEST(mergerLayer);
+    armnn::IConnectableLayer* concatLayer = net.AddConcatLayer(concatDesc, "concat layer");
+    BOOST_TEST(concatLayer);
 
-    softmaxLayer1->GetOutputSlot(0).Connect(mergerLayer->GetInputSlot(0));
-    softmaxLayer2->GetOutputSlot(0).Connect(mergerLayer->GetInputSlot(1));
+    softmaxLayer1->GetOutputSlot(0).Connect(concatLayer->GetInputSlot(0));
+    softmaxLayer2->GetOutputSlot(0).Connect(concatLayer->GetInputSlot(1));
 
     // Adds an output layer.
     armnn::IConnectableLayer* outputLayer = net.AddOutputLayer(0, "output layer");
     BOOST_TEST(outputLayer);
 
-    mergerLayer->GetOutputSlot(0).Connect(outputLayer->GetInputSlot(0));
+    concatLayer->GetOutputSlot(0).Connect(outputLayer->GetInputSlot(0));
 
     BOOST_TEST(splitterLayer->GetNumOutputSlots() == 2);
     BOOST_TEST(splitterLayer->GetOutputSlot(0).GetConnection(0) == &softmaxLayer1->GetInputSlot(0));
@@ -278,11 +276,11 @@
     BOOST_TEST(splitterLayer->GetOutputSlot(1).GetConnection(0) == &softmaxLayer2->GetInputSlot(0));
     BOOST_TEST(&splitterLayer->GetOutputSlot(1) == softmaxLayer2->GetInputSlot(0).GetConnection());
 
-    BOOST_TEST(mergerLayer->GetNumInputSlots() == 2);
-    BOOST_TEST(softmaxLayer1->GetOutputSlot(0).GetConnection(0) == &mergerLayer->GetInputSlot(0));
-    BOOST_TEST(&softmaxLayer1->GetOutputSlot(0) == mergerLayer->GetInputSlot(0).GetConnection());
-    BOOST_TEST(softmaxLayer2->GetOutputSlot(0).GetConnection(0) == &mergerLayer->GetInputSlot(1));
-    BOOST_TEST(&softmaxLayer2->GetOutputSlot(0) == mergerLayer->GetInputSlot(1).GetConnection());
+    BOOST_TEST(concatLayer->GetNumInputSlots() == 2);
+    BOOST_TEST(softmaxLayer1->GetOutputSlot(0).GetConnection(0) == &concatLayer->GetInputSlot(0));
+    BOOST_TEST(&softmaxLayer1->GetOutputSlot(0) == concatLayer->GetInputSlot(0).GetConnection());
+    BOOST_TEST(softmaxLayer2->GetOutputSlot(0).GetConnection(0) == &concatLayer->GetInputSlot(1));
+    BOOST_TEST(&softmaxLayer2->GetOutputSlot(0) == concatLayer->GetInputSlot(1).GetConnection());
 }
 
 BOOST_AUTO_TEST_CASE(NetworkModification_SplitterAddition)
diff --git a/src/armnn/test/QuantizerTest.cpp b/src/armnn/test/QuantizerTest.cpp
index f2c739d..337c615 100644
--- a/src/armnn/test/QuantizerTest.cpp
+++ b/src/armnn/test/QuantizerTest.cpp
@@ -1238,15 +1238,15 @@
     VisitLayersTopologically(quantizedNetworkQSymm16.get(), validatorQSymm16);
 }
 
-BOOST_AUTO_TEST_CASE(QuantizeMerger)
+BOOST_AUTO_TEST_CASE(QuantizeConcat)
 {
-    class TestMergerQuantization : public TestQuantization
+    class TestConcatQuantization : public TestQuantization
     {
     public:
-        TestMergerQuantization(const TensorShape& inputShape, const TensorShape& outputShape)
+        TestConcatQuantization(const TensorShape& inputShape, const TensorShape& outputShape)
         : TestQuantization(inputShape, outputShape) {}
 
-        TestMergerQuantization(const QuantizerOptions& options,
+        TestConcatQuantization(const QuantizerOptions& options,
                                const TensorShape& inputShape,
                                const TensorShape& outputShape)
         : TestQuantization(options, inputShape, outputShape) {}
@@ -1259,8 +1259,8 @@
                               LayerBindingId id,
                               const char* name = nullptr) override
         {}
-        void VisitMergerLayer(const IConnectableLayer* layer,
-                              const OriginsDescriptor& mergerDescriptor,
+        void VisitConcatLayer(const IConnectableLayer* layer,
+                              const OriginsDescriptor& originsDescriptor,
                               const char* name = nullptr) override
         {
             TensorInfo info = layer->GetOutputSlot(0).GetTensorInfo();
@@ -1277,17 +1277,15 @@
     IConnectableLayer* input2 = network->AddInputLayer(2);
 
     OriginsDescriptor descriptor(3, 1);
-    ARMNN_NO_DEPRECATE_WARN_BEGIN
-    IConnectableLayer* merger = network->AddMergerLayer(descriptor);
-    ARMNN_NO_DEPRECATE_WARN_END
+    IConnectableLayer* concatLayer = network->AddConcatLayer(descriptor);
 
     IConnectableLayer* output0 = network->AddOutputLayer(3);
 
     // Establish connections
-    input0->GetOutputSlot(0).Connect(merger->GetInputSlot(0));
-    input1->GetOutputSlot(0).Connect(merger->GetInputSlot(1));
-    input2->GetOutputSlot(0).Connect(merger->GetInputSlot(2));
-    merger->GetOutputSlot(0).Connect(output0->GetInputSlot(0));
+    input0->GetOutputSlot(0).Connect(concatLayer->GetInputSlot(0));
+    input1->GetOutputSlot(0).Connect(concatLayer->GetInputSlot(1));
+    input2->GetOutputSlot(0).Connect(concatLayer->GetInputSlot(2));
+    concatLayer->GetOutputSlot(0).Connect(output0->GetInputSlot(0));
 
     // Set TensorInfo
     const TensorShape shape{1U};
@@ -1296,7 +1294,7 @@
     input0->GetOutputSlot(0).SetTensorInfo(info);
     input1->GetOutputSlot(0).SetTensorInfo(info);
     input2->GetOutputSlot(0).SetTensorInfo(info);
-    merger->GetOutputSlot(0).SetTensorInfo(info);
+    concatLayer->GetOutputSlot(0).SetTensorInfo(info);
 
     const QuantizerOptions options(DataType::QuantisedSymm16);
     INetworkQuantizerPtr quantizerPtrQAsymm8 =  INetworkQuantizer::Create(network.get());
@@ -1314,11 +1312,11 @@
     quantizerPtrQSymm16->OverrideInputRange(2, min, (max - 7.8f));
 
     INetworkPtr quantizedNetworkQAsymm8 = quantizerPtrQAsymm8->ExportNetwork();
-    TestMergerQuantization validatorQAsymm8(shape, shape);
+    TestConcatQuantization validatorQAsymm8(shape, shape);
     VisitLayersTopologically(quantizedNetworkQAsymm8.get(), validatorQAsymm8);
 
     INetworkPtr quantizedNetworkQSymm16 = quantizerPtrQSymm16->ExportNetwork();
-    TestMergerQuantization validatorQSymm16(options, shape, shape);
+    TestConcatQuantization validatorQSymm16(options, shape, shape);
     VisitLayersTopologically(quantizedNetworkQSymm16.get(), validatorQSymm16);
 }
 
diff --git a/src/armnn/test/SubgraphViewTests.cpp b/src/armnn/test/SubgraphViewTests.cpp
index 8369fc4..3e762e2 100644
--- a/src/armnn/test/SubgraphViewTests.cpp
+++ b/src/armnn/test/SubgraphViewTests.cpp
@@ -223,21 +223,21 @@
     Layer* const convLayer1 = graph.AddLayer<Convolution2dLayer>(convDescriptor, "conv1");
     Layer* const convLayer2 = graph.AddLayer<Convolution2dLayer>(convDescriptor, "conv2");
 
-    OriginsDescriptor mergerDescriptor(2);
-    Layer* const mergerLayer = graph.AddLayer<MergerLayer>(mergerDescriptor, "merger");
+    OriginsDescriptor concatDescriptor(2);
+    Layer* const concatLayer = graph.AddLayer<ConcatLayer>(concatDescriptor, "concat");
 
     Layer* const outputLayer = graph.AddLayer<OutputLayer>(0, "output");
 
     inputLayer->GetOutputSlot(0).Connect(splitterLayer->GetInputSlot(0));
     splitterLayer->GetOutputSlot(0).Connect(convLayer1->GetInputSlot(0));
     splitterLayer->GetOutputSlot(1).Connect(convLayer2->GetInputSlot(0));
-    convLayer1->GetOutputSlot(0).Connect(mergerLayer->GetInputSlot(0));
-    convLayer2->GetOutputSlot(0).Connect(mergerLayer->GetInputSlot(1));
-    mergerLayer->GetOutputSlot(0).Connect(outputLayer->GetInputSlot(0));
+    convLayer1->GetOutputSlot(0).Connect(concatLayer->GetInputSlot(0));
+    convLayer2->GetOutputSlot(0).Connect(concatLayer->GetInputSlot(1));
+    concatLayer->GetOutputSlot(0).Connect(outputLayer->GetInputSlot(0));
 
     // Construct sub-graph
     SubgraphViewSelector::SubgraphViewPtr subgraph = CreateSubgraphViewFrom(CreateInputsFrom({convLayer1, convLayer2}),
-                                                                            CreateOutputsFrom({mergerLayer}),
+                                                                            CreateOutputsFrom({concatLayer}),
                                                                             {});
 
     // Save sub-graph connections for comparison after substitution
@@ -270,8 +270,8 @@
     Convolution2dDescriptor convDescriptor;
     Layer* const convLayer1 = graph.AddLayer<Convolution2dLayer>(convDescriptor, "conv1");
     Layer* const convLayer2 = graph.AddLayer<Convolution2dLayer>(convDescriptor, "conv2");
-    OriginsDescriptor mergerDescriptor(2);
-    Layer* const mergerLayer = graph.AddLayer<MergerLayer>(mergerDescriptor, "merger");
+    OriginsDescriptor concatDescriptor(2);
+    Layer* const concatLayer = graph.AddLayer<ConcatLayer>(concatDescriptor, "concat");
     Layer* const outputLayer = graph.AddLayer<OutputLayer>(0, "output");
 
     ViewsDescriptor splitterDescriptor(2);
@@ -280,9 +280,9 @@
     inputLayer->GetOutputSlot(0).Connect(splitterLayer->GetInputSlot(0));
     splitterLayer->GetOutputSlot(0).Connect(convLayer1->GetInputSlot(0));
     splitterLayer->GetOutputSlot(1).Connect(convLayer2->GetInputSlot(0));
-    convLayer1->GetOutputSlot(0).Connect(mergerLayer->GetInputSlot(0));
-    convLayer2->GetOutputSlot(0).Connect(mergerLayer->GetInputSlot(1));
-    mergerLayer->GetOutputSlot(0).Connect(outputLayer->GetInputSlot(0));
+    convLayer1->GetOutputSlot(0).Connect(concatLayer->GetInputSlot(0));
+    convLayer2->GetOutputSlot(0).Connect(concatLayer->GetInputSlot(1));
+    concatLayer->GetOutputSlot(0).Connect(outputLayer->GetInputSlot(0));
 
     // Construct sub-graph
     SubgraphViewSelector::SubgraphViewPtr subgraph = CreateSubgraphViewFrom(CreateInputsFrom({splitterLayer}),
@@ -323,17 +323,17 @@
     Layer* const convLayer1 = graph.AddLayer<Convolution2dLayer>(convDescriptor, "conv1");
     Layer* const convLayer2 = graph.AddLayer<Convolution2dLayer>(convDescriptor, "conv2");
 
-    OriginsDescriptor mergerDescriptor(2);
-    Layer* const mergerLayer = graph.AddLayer<MergerLayer>(mergerDescriptor, "merger");
+    OriginsDescriptor concatDescriptor(2);
+    Layer* const concatLayer = graph.AddLayer<ConcatLayer>(concatDescriptor, "concat");
 
     Layer* const outputLayer = graph.AddLayer<OutputLayer>(0, "output");
 
     inputLayer->GetOutputSlot(0).Connect(splitterLayer->GetInputSlot(0));
     splitterLayer->GetOutputSlot(0).Connect(convLayer1->GetInputSlot(0));
     splitterLayer->GetOutputSlot(1).Connect(convLayer2->GetInputSlot(0));
-    convLayer1->GetOutputSlot(0).Connect(mergerLayer->GetInputSlot(0));
-    convLayer2->GetOutputSlot(0).Connect(mergerLayer->GetInputSlot(1));
-    mergerLayer->GetOutputSlot(0).Connect(outputLayer->GetInputSlot(0));
+    convLayer1->GetOutputSlot(0).Connect(concatLayer->GetInputSlot(0));
+    convLayer2->GetOutputSlot(0).Connect(concatLayer->GetInputSlot(1));
+    concatLayer->GetOutputSlot(0).Connect(outputLayer->GetInputSlot(0));
 
     // Construct sub-graph
     SubgraphViewSelector::SubgraphViewPtr subgraph = CreateSubgraphViewFrom(CreateInputsFrom({convLayer1, convLayer2}),
@@ -376,8 +376,8 @@
     Layer* const convLayer1 = graph.AddLayer<Convolution2dLayer>(convDescriptor, "conv1");
     Layer* const convLayer2 = graph.AddLayer<Convolution2dLayer>(convDescriptor, "conv2");
 
-    OriginsDescriptor mergerDescriptor(2);
-    Layer* const mergerLayer = graph.AddLayer<MergerLayer>(mergerDescriptor, "merger");
+    OriginsDescriptor concatDescriptor(2);
+    Layer* const concatLayer = graph.AddLayer<ConcatLayer>(concatDescriptor, "concat");
 
     graph.AddLayer<OutputLayer>(0, "output");
 
@@ -387,7 +387,7 @@
                                                                             {splitterLayer,
                                                                              convLayer1,
                                                                              convLayer2,
-                                                                             mergerLayer});
+                                                                             concatLayer});
 
     // Construct dummy pre-compiled layer
     PreCompiledDescriptor preCompiledDescriptor(0, 0);
@@ -538,8 +538,8 @@
     //
     Graph graph;
 
-    OriginsDescriptor mergerDescriptor(2);
-    auto x2 = graph.AddLayer<MergerLayer>(mergerDescriptor, "x2");
+    OriginsDescriptor concatDescriptor(2);
+    auto x2 = graph.AddLayer<ConcatLayer>(concatDescriptor, "x2");
     auto m3 = graph.InsertNewLayer<ActivationLayer>(x2->GetInputSlot(0),
                                                     ActivationDescriptor{},
                                                     "m3");
@@ -856,14 +856,14 @@
     Graph graph;
 
     ActivationDescriptor activationDefaults;
-    OriginsDescriptor mergerDescriptor(2);
+    OriginsDescriptor concatDescriptor(2);
 
     auto x1 = graph.AddLayer<InputLayer>(0, "x1");
     auto x2 = graph.AddLayer<InputLayer>(1, "x2");
 
     auto m1 = graph.AddLayer<ActivationLayer>(activationDefaults, "m1");
     auto m2 = graph.AddLayer<ActivationLayer>(activationDefaults, "m2");
-    auto m3 = graph.AddLayer<MergerLayer>(mergerDescriptor, "m3");
+    auto m3 = graph.AddLayer<ConcatLayer>(concatDescriptor, "m3");
 
     auto m4 = graph.AddLayer<ActivationLayer>(activationDefaults, "m4");
     auto m5 = graph.AddLayer<ActivationLayer>(activationDefaults, "m5");
@@ -887,11 +887,11 @@
     SubgraphViewSelector::Subgraphs subgraphs =
         SubgraphViewSelector::SelectSubgraphs(
             graph,
-            // select Activation and Merger Layers M1, M2, M3, M4, M5
+            // select Activation and Concat Layers M1, M2, M3, M4, M5
             [](const Layer & l)
             {
                 bool toSelect = (l.GetType() == LayerType::Activation
-                                 || l.GetType() == LayerType::Merger);
+                                 || l.GetType() == LayerType::Concat);
                 return toSelect;
             });
 
@@ -994,18 +994,18 @@
     Layer* const convLayer1 = graph.AddLayer<Convolution2dLayer>(convDescriptor, "conv1");
     Layer* const convLayer2 = graph.AddLayer<Convolution2dLayer>(convDescriptor, "conv2");
 
-    OriginsDescriptor mergerDescriptor(2);
-    Layer* const mergerLayer = graph.AddLayer<MergerLayer>(mergerDescriptor, "merger");
-    mergerLayer->SetBackendId(Compute::CpuAcc);
+    OriginsDescriptor concatDescriptor(2);
+    Layer* const pConcatLayer = graph.AddLayer<ConcatLayer>(concatDescriptor, "concat");
+    pConcatLayer->SetBackendId(Compute::CpuAcc);
 
     Layer* const outputLayer = graph.AddLayer<OutputLayer>(0, "output");
 
     inputLayer->GetOutputSlot(0).Connect(splitterLayer->GetInputSlot(0));
     splitterLayer->GetOutputSlot(0).Connect(convLayer1->GetInputSlot(0));
     splitterLayer->GetOutputSlot(1).Connect(convLayer2->GetInputSlot(0));
-    convLayer1->GetOutputSlot(0).Connect(mergerLayer->GetInputSlot(0));
-    convLayer2->GetOutputSlot(0).Connect(mergerLayer->GetInputSlot(1));
-    mergerLayer->GetOutputSlot(0).Connect(outputLayer->GetInputSlot(0));
+    convLayer1->GetOutputSlot(0).Connect(pConcatLayer->GetInputSlot(0));
+    convLayer2->GetOutputSlot(0).Connect(pConcatLayer->GetInputSlot(1));
+    pConcatLayer->GetOutputSlot(0).Connect(outputLayer->GetInputSlot(0));
 
     // CpuAcc sub graph selector
     SubgraphViewSelector::Subgraphs subgraphs =
@@ -1096,7 +1096,7 @@
     //
     Graph graph;
 
-    OriginsDescriptor mergerDescriptor(2);
+    OriginsDescriptor originsDescriptor(2);
     auto x0 = graph.AddLayer<InputLayer>(0, "x0");
     auto m0 = graph.AddLayer<ActivationLayer>(ActivationDescriptor{}, "m0");
     auto x1 = graph.AddLayer<ActivationLayer>(ActivationDescriptor{}, "x1");
diff --git a/src/armnn/test/TestNameAndDescriptorLayerVisitor.cpp b/src/armnn/test/TestNameAndDescriptorLayerVisitor.cpp
index f94906d..478f029 100644
--- a/src/armnn/test/TestNameAndDescriptorLayerVisitor.cpp
+++ b/src/armnn/test/TestNameAndDescriptorLayerVisitor.cpp
@@ -20,7 +20,7 @@
     }
 }
 
-void Set2dDataValues(MergerDescriptor descriptor, u_int32_t value)
+void Set2dDataValues(OriginsDescriptor& descriptor, u_int32_t value)
 {
     for (unsigned int i = 0; i < descriptor.GetNumViews(); ++i)
     {
@@ -230,32 +230,28 @@
     layer->Accept(visitor);
 }
 
-BOOST_AUTO_TEST_CASE(CheckMergerLayerVisitorNameAndDescriptor)
+BOOST_AUTO_TEST_CASE(CheckConcatLayerVisitorNameAndDescriptor)
 {
-    const char* layerName = "MergerLayer";
-    MergerDescriptor descriptor(2, 2);
+    const char* layerName = "ConcatLayer";
+    OriginsDescriptor descriptor(2, 2);
     Set2dDataValues(descriptor, 1);
     descriptor.SetConcatAxis(1);
-    TestMergerLayerVisitor visitor(descriptor, layerName);
+    TestConcatLayerVisitor visitor(descriptor, layerName);
     Network net;
 
-    ARMNN_NO_DEPRECATE_WARN_BEGIN
-    IConnectableLayer *const layer = net.AddMergerLayer(descriptor, layerName);
-    ARMNN_NO_DEPRECATE_WARN_END
+    IConnectableLayer *const layer = net.AddConcatLayer(descriptor, layerName);
     layer->Accept(visitor);
 }
 
-BOOST_AUTO_TEST_CASE(CheckMergerLayerVisitorNameNullAndDescriptor)
+BOOST_AUTO_TEST_CASE(CheckConcatLayerVisitorNameNullAndDescriptor)
 {
-    MergerDescriptor descriptor(2, 2);
+    OriginsDescriptor descriptor(2, 2);
     Set2dDataValues(descriptor, 1);
     descriptor.SetConcatAxis(1);
-    TestMergerLayerVisitor visitor(descriptor);
+    TestConcatLayerVisitor visitor(descriptor);
     Network net;
 
-    ARMNN_NO_DEPRECATE_WARN_BEGIN
-    IConnectableLayer *const layer = net.AddMergerLayer(descriptor);
-    ARMNN_NO_DEPRECATE_WARN_END
+    IConnectableLayer *const layer = net.AddConcatLayer(descriptor);
     layer->Accept(visitor);
 }
 
diff --git a/src/armnn/test/TestNameAndDescriptorLayerVisitor.hpp b/src/armnn/test/TestNameAndDescriptorLayerVisitor.hpp
index bf23332..0db956d 100644
--- a/src/armnn/test/TestNameAndDescriptorLayerVisitor.hpp
+++ b/src/armnn/test/TestNameAndDescriptorLayerVisitor.hpp
@@ -317,70 +317,70 @@
     };
 };
 
-class TestMergerLayerVisitor : public TestLayerVisitor
+class TestConcatLayerVisitor : public TestLayerVisitor
 {
 private:
     OriginsDescriptor m_VisitorDescriptor;
 
 public:
-    explicit TestMergerLayerVisitor(const OriginsDescriptor& mergerDescriptor, const char* name = nullptr)
+    explicit TestConcatLayerVisitor(const OriginsDescriptor& concatDescriptor, const char* name = nullptr)
         : TestLayerVisitor(name)
-        , m_VisitorDescriptor(mergerDescriptor.GetNumViews(), mergerDescriptor.GetNumDimensions())
+        , m_VisitorDescriptor(concatDescriptor.GetNumViews(), concatDescriptor.GetNumDimensions())
     {
-        m_VisitorDescriptor.SetConcatAxis(mergerDescriptor.GetConcatAxis());
+        m_VisitorDescriptor.SetConcatAxis(concatDescriptor.GetConcatAxis());
 
-        if (mergerDescriptor.GetNumViews() != m_VisitorDescriptor.GetNumViews())
+        if (concatDescriptor.GetNumViews() != m_VisitorDescriptor.GetNumViews())
         {
             BOOST_ERROR("Unequal number of views in splitter descriptor.");
         }
-        else if (mergerDescriptor.GetNumDimensions() != m_VisitorDescriptor.GetNumDimensions())
+        else if (concatDescriptor.GetNumDimensions() != m_VisitorDescriptor.GetNumDimensions())
         {
             BOOST_ERROR("Unequal number of dimensions in splitter descriptor.");
         }
         else
         {
-            for (unsigned int i = 0; i < mergerDescriptor.GetNumViews(); ++i)
+            for (unsigned int i = 0; i < concatDescriptor.GetNumViews(); ++i)
             {
-                for (unsigned int j = 0; j < mergerDescriptor.GetNumDimensions(); ++j)
+                for (unsigned int j = 0; j < concatDescriptor.GetNumDimensions(); ++j)
                 {
-                    m_VisitorDescriptor.SetViewOriginCoord(i, j, mergerDescriptor.GetViewOrigin(i)[j]);
+                    m_VisitorDescriptor.SetViewOriginCoord(i, j, concatDescriptor.GetViewOrigin(i)[j]);
                 }
             }
         }
     };
 
-    void CheckDescriptor(const OriginsDescriptor& mergerDescriptor)
+    void CheckDescriptor(const OriginsDescriptor& concatDescriptor)
     {
-        BOOST_CHECK_EQUAL(mergerDescriptor.GetNumViews(), m_VisitorDescriptor.GetNumViews());
-        BOOST_CHECK_EQUAL(mergerDescriptor.GetNumDimensions(), m_VisitorDescriptor.GetNumDimensions());
-        BOOST_CHECK_EQUAL(mergerDescriptor.GetConcatAxis(), m_VisitorDescriptor.GetConcatAxis());
+        BOOST_CHECK_EQUAL(concatDescriptor.GetNumViews(), m_VisitorDescriptor.GetNumViews());
+        BOOST_CHECK_EQUAL(concatDescriptor.GetNumDimensions(), m_VisitorDescriptor.GetNumDimensions());
+        BOOST_CHECK_EQUAL(concatDescriptor.GetConcatAxis(), m_VisitorDescriptor.GetConcatAxis());
 
-        if (mergerDescriptor.GetNumViews() != m_VisitorDescriptor.GetNumViews())
+        if (concatDescriptor.GetNumViews() != m_VisitorDescriptor.GetNumViews())
         {
             BOOST_ERROR("Unequal number of views in splitter descriptor.");
         }
-        else if (mergerDescriptor.GetNumDimensions() != m_VisitorDescriptor.GetNumDimensions())
+        else if (concatDescriptor.GetNumDimensions() != m_VisitorDescriptor.GetNumDimensions())
         {
             BOOST_ERROR("Unequal number of dimensions in splitter descriptor.");
         }
         else
         {
-            for (unsigned int i = 0; i < mergerDescriptor.GetNumViews(); ++i)
+            for (unsigned int i = 0; i < concatDescriptor.GetNumViews(); ++i)
             {
-                for (unsigned int j = 0; j < mergerDescriptor.GetNumDimensions(); ++j)
+                for (unsigned int j = 0; j < concatDescriptor.GetNumDimensions(); ++j)
                 {
-                    BOOST_CHECK_EQUAL(mergerDescriptor.GetViewOrigin(i)[j], m_VisitorDescriptor.GetViewOrigin(i)[j]);
+                    BOOST_CHECK_EQUAL(concatDescriptor.GetViewOrigin(i)[j], m_VisitorDescriptor.GetViewOrigin(i)[j]);
                 }
             }
         }
     }
 
-    void VisitMergerLayer(const IConnectableLayer* layer,
-                          const OriginsDescriptor& mergerDescriptor,
+    void VisitConcatLayer(const IConnectableLayer* layer,
+                          const OriginsDescriptor& concatDescriptor,
                           const char* name = nullptr) override
     {
         CheckLayerPointer(layer);
-        CheckDescriptor(mergerDescriptor);
+        CheckDescriptor(concatDescriptor);
         CheckLayerName(name);
     };
 };
diff --git a/src/armnnCaffeParser/CaffeParser.cpp b/src/armnnCaffeParser/CaffeParser.cpp
index a27abc7..4027e94 100644
--- a/src/armnnCaffeParser/CaffeParser.cpp
+++ b/src/armnnCaffeParser/CaffeParser.cpp
@@ -564,37 +564,37 @@
         convLayer->GetOutputSlot(0).SetTensorInfo(BlobShapeToTensorInfo(outputShape));
     }
 
-    // If the convolution was performed in chunks, add a layer to merge the results
+    // If the convolution was performed in chunks, add a layer to concatenate the results
 
     // The merge input shape matches that of the convolution output
-    unsigned int mergeDimSizes[4] = {static_cast<unsigned int>(outputShape.dim(0)),
-                                        static_cast<unsigned int>(outputShape.dim(1)),
-                                        static_cast<unsigned int>(outputShape.dim(2)),
-                                        static_cast<unsigned int>(outputShape.dim(3))};
+    unsigned int concatDimSizes[4] = {static_cast<unsigned int>(outputShape.dim(0)),
+                                      static_cast<unsigned int>(outputShape.dim(1)),
+                                      static_cast<unsigned int>(outputShape.dim(2)),
+                                      static_cast<unsigned int>(outputShape.dim(3))};
 
-    // This is used to describe how the input is to be merged
-    OriginsDescriptor mergeDesc(numGroups);
+    // This is used to describe how the input is to be concatenated
+    OriginsDescriptor concatDesc(numGroups);
 
     // Now create an input node for each group, using the name from
     // the output of the corresponding convolution
     for (unsigned int g = 0; g < numGroups; ++g)
     {
-        mergeDesc.SetViewOriginCoord(g, 1, mergeDimSizes[1] * g);
+        concatDesc.SetViewOriginCoord(g, 1, concatDimSizes[1] * g);
     }
 
-    // Make sure the output from the merge is the correct size to hold the data for all groups
-    mergeDimSizes[1] *= numGroups;
-    outputShape.set_dim(1, mergeDimSizes[1]);
+    // Make sure the output from the concat is the correct size to hold the data for all groups
+    concatDimSizes[1] *= numGroups;
+    outputShape.set_dim(1, concatDimSizes[1]);
 
-    // Finally add the merge layer
-    IConnectableLayer* mergerLayer = m_Network->AddConcatLayer(mergeDesc, layerParam.name().c_str());
+    // Finally add the concat layer
+    IConnectableLayer* concatLayer = m_Network->AddConcatLayer(concatDesc, layerParam.name().c_str());
 
-    if (!mergerLayer)
+    if (!concatLayer)
     {
         throw ParseException(
             boost::str(
                 boost::format(
-                    "Failed to create final merger layer for Split+Convolution+Merger. "
+                    "Failed to create final concat layer for Split+Convolution+Concat. "
                     "Layer=%1% #groups=%2% #filters=%3% %4%") %
                     layerParam.name() %
                     numGroups %
@@ -604,10 +604,10 @@
 
     for (unsigned int g = 0; g < numGroups; ++g)
     {
-        convLayers[g]->GetOutputSlot(0).Connect(mergerLayer->GetInputSlot(g));
+        convLayers[g]->GetOutputSlot(0).Connect(concatLayer->GetInputSlot(g));
     }
-    mergerLayer->GetOutputSlot(0).SetTensorInfo(armnn::TensorInfo(4, mergeDimSizes, DataType::Float32));
-    SetArmnnOutputSlotForCaffeTop(layerParam.top(0), mergerLayer->GetOutputSlot(0));
+    concatLayer->GetOutputSlot(0).SetTensorInfo(armnn::TensorInfo(4, concatDimSizes, DataType::Float32));
+    SetArmnnOutputSlotForCaffeTop(layerParam.top(0), concatLayer->GetOutputSlot(0));
 }
 
 void CaffeParserBase::AddConvLayerWithDepthwiseConv(const caffe::LayerParameter& layerParam,
@@ -798,7 +798,7 @@
         else
         {
             // we split the input by channels into channels/groups separate convolutions
-            // and merger the results afterwards
+            // and concatenate the results afterwards
             AddConvLayerWithSplits(layerParam, convolution2dDescriptor, kernelW, kernelH);
             return;
         }
diff --git a/src/armnnDeserializer/Deserializer.cpp b/src/armnnDeserializer/Deserializer.cpp
index 14cf232..75c258b 100644
--- a/src/armnnDeserializer/Deserializer.cpp
+++ b/src/armnnDeserializer/Deserializer.cpp
@@ -192,6 +192,7 @@
     m_ParserFunctions[Layer_AdditionLayer]               = &Deserializer::ParseAdd;
     m_ParserFunctions[Layer_BatchToSpaceNdLayer]         = &Deserializer::ParseBatchToSpaceNd;
     m_ParserFunctions[Layer_BatchNormalizationLayer]     = &Deserializer::ParseBatchNormalization;
+    m_ParserFunctions[Layer_ConcatLayer]                 = &Deserializer::ParseConcat;
     m_ParserFunctions[Layer_ConstantLayer]               = &Deserializer::ParseConstant;
     m_ParserFunctions[Layer_Convolution2dLayer]          = &Deserializer::ParseConvolution2d;
     m_ParserFunctions[Layer_DepthwiseConvolution2dLayer] = &Deserializer::ParseDepthwiseConvolution2d;
@@ -241,6 +242,8 @@
             return graphPtr->layers()->Get(layerIndex)->layer_as_BatchToSpaceNdLayer()->base();
         case Layer::Layer_BatchNormalizationLayer:
             return graphPtr->layers()->Get(layerIndex)->layer_as_BatchNormalizationLayer()->base();
+        case Layer::Layer_ConcatLayer:
+            return graphPtr->layers()->Get(layerIndex)->layer_as_ConcatLayer()->base();
         case Layer::Layer_ConstantLayer:
             return graphPtr->layers()->Get(layerIndex)->layer_as_ConstantLayer()->base();
         case Layer::Layer_Convolution2dLayer:
@@ -1229,6 +1232,22 @@
     RegisterOutputSlots(graph, layerIndex, layer);
 }
 
+const armnnSerializer::OriginsDescriptor* GetOriginsDescriptor(const armnnSerializer::SerializedGraph* graph,
+                                                               unsigned int layerIndex)
+{
+    auto layerType = graph->layers()->Get(layerIndex)->layer_type();
+
+    switch (layerType)
+    {
+        case Layer::Layer_ConcatLayer:
+            return graph->layers()->Get(layerIndex)->layer_as_ConcatLayer()->descriptor();
+        case Layer::Layer_MergerLayer:
+            return graph->layers()->Get(layerIndex)->layer_as_MergerLayer()->descriptor();
+        default:
+            throw armnn::Exception("unknown layer type, should be concat or merger");
+    }
+}
+
 void Deserializer::ParseConcat(GraphPtr graph, unsigned int layerIndex)
 {
     CHECK_LAYERS(graph, 0, layerIndex);
@@ -1237,18 +1256,17 @@
     auto outputs = GetOutputs(graph, layerIndex);
     CHECK_VALID_SIZE(outputs.size(), 1);
 
-    auto mergerLayer = graph->layers()->Get(layerIndex)->layer_as_MergerLayer();
     auto layerName = GetLayerName(graph, layerIndex);
-    auto mergerDescriptor = mergerLayer->descriptor();
-    unsigned int numViews = mergerDescriptor->numViews();
-    unsigned int numDimensions = mergerDescriptor->numDimensions();
+    auto originsDescriptor = GetOriginsDescriptor(graph, layerIndex);
+    unsigned int numViews = originsDescriptor->numViews();
+    unsigned int numDimensions = originsDescriptor->numDimensions();
 
     // can now check the number of inputs == number of views
     auto inputs = GetInputs(graph, layerIndex);
     CHECK_VALID_SIZE(inputs.size(), numViews);
 
     armnn::OriginsDescriptor descriptor(numViews, numDimensions);
-    auto originsPtr = mergerDescriptor->viewOrigins();
+    auto originsPtr = originsDescriptor->viewOrigins();
     for (unsigned int v = 0; v < numViews; ++v)
     {
         auto originPtr = originsPtr->Get(v);
@@ -1258,7 +1276,7 @@
             descriptor.SetViewOriginCoord(v, d, value);
         }
     }
-    descriptor.SetConcatAxis(mergerDescriptor->concatAxis());
+    descriptor.SetConcatAxis(originsDescriptor->concatAxis());
 
     IConnectableLayer* layer = m_Network->AddConcatLayer(descriptor, layerName.c_str());
     armnn::TensorInfo outputTensorInfo = ToTensorInfo(outputs[0]);
diff --git a/src/armnnOnnxParser/OnnxParser.cpp b/src/armnnOnnxParser/OnnxParser.cpp
index 2b4ce7d..6f83dc5 100644
--- a/src/armnnOnnxParser/OnnxParser.cpp
+++ b/src/armnnOnnxParser/OnnxParser.cpp
@@ -1294,7 +1294,7 @@
         else
         {
             // TODO: split the input by channels into channels/groups separate convolutions
-            //  and merger the results afterwards
+            //  and concatenate the results afterwards
             throw ParseException(boost::str(
                 boost::format("Error parsing Convolution node: %1%. "
                 "The 'group'=%2% parameter should be 1 or be equal to the "
diff --git a/src/armnnSerializer/ArmnnSchema.fbs b/src/armnnSerializer/ArmnnSchema.fbs
index 0419c4b..5a001de 100644
--- a/src/armnnSerializer/ArmnnSchema.fbs
+++ b/src/armnnSerializer/ArmnnSchema.fbs
@@ -120,7 +120,8 @@
     Quantize = 35,
     Dequantize = 36,
     Merge = 37,
-    Switch = 38
+    Switch = 38,
+    Concat = 39
 }
 
 // Base layer table to be used as part of other layers
@@ -442,6 +443,11 @@
     dataLayout:DataLayout;
 }
 
+table ConcatLayer {
+    base:LayerBase;
+    descriptor:OriginsDescriptor;
+}
+
 table MergerLayer {
     base:LayerBase;
     descriptor:OriginsDescriptor;
@@ -577,7 +583,8 @@
     QuantizeLayer,
     DequantizeLayer,
     MergeLayer,
-    SwitchLayer
+    SwitchLayer,
+    ConcatLayer
 }
 
 table AnyLayer {
diff --git a/src/armnnSerializer/Serializer.cpp b/src/armnnSerializer/Serializer.cpp
index 865ed7a..c49f6f9 100644
--- a/src/armnnSerializer/Serializer.cpp
+++ b/src/armnnSerializer/Serializer.cpp
@@ -515,17 +515,24 @@
 }
 
 void SerializerVisitor::VisitMergerLayer(const armnn::IConnectableLayer* layer,
-                                         const armnn::OriginsDescriptor& mergerDescriptor,
+                                         const armnn::MergerDescriptor& mergerDescriptor,
                                          const char* name)
 {
-    auto flatBufferMergerBaseLayer = CreateLayerBase(layer, serializer::LayerType::LayerType_Merger);
+    VisitConcatLayer(layer, mergerDescriptor, name);
+}
+
+void SerializerVisitor::VisitConcatLayer(const armnn::IConnectableLayer* layer,
+                                         const armnn::ConcatDescriptor& concatDescriptor,
+                                         const char* name)
+{
+    auto flatBufferConcatBaseLayer = CreateLayerBase(layer, serializer::LayerType::LayerType_Concat);
 
     std::vector<flatbuffers::Offset<UintVector>> views;
-    for (unsigned int v = 0; v < mergerDescriptor.GetNumViews(); ++v)
+    for (unsigned int v = 0; v < concatDescriptor.GetNumViews(); ++v)
     {
-        const uint32_t* origin = mergerDescriptor.GetViewOrigin(v);
+        const uint32_t* origin = concatDescriptor.GetViewOrigin(v);
         std::vector<uint32_t> origins;
-        for (unsigned int d = 0; d < mergerDescriptor.GetNumDimensions(); ++d)
+        for (unsigned int d = 0; d < concatDescriptor.GetNumDimensions(); ++d)
         {
             origins.push_back(origin[d]);
         }
@@ -534,17 +541,17 @@
         views.push_back(uintVector);
     }
 
-    auto flatBufferMergerDescriptor = CreateOriginsDescriptor(m_flatBufferBuilder,
-                                                              mergerDescriptor.GetConcatAxis(),
-                                                              mergerDescriptor.GetNumViews(),
-                                                              mergerDescriptor.GetNumDimensions(),
+    auto flatBufferConcatDescriptor = CreateOriginsDescriptor(m_flatBufferBuilder,
+                                                              concatDescriptor.GetConcatAxis(),
+                                                              concatDescriptor.GetNumViews(),
+                                                              concatDescriptor.GetNumDimensions(),
                                                               m_flatBufferBuilder.CreateVector(views));
 
-    auto flatBufferLayer = CreateMergerLayer(m_flatBufferBuilder,
-                                             flatBufferMergerBaseLayer,
-                                             flatBufferMergerDescriptor);
+    auto flatBufferLayer = CreateConcatLayer(m_flatBufferBuilder,
+                                             flatBufferConcatBaseLayer,
+                                             flatBufferConcatDescriptor);
 
-    CreateAnyLayer(flatBufferLayer.o, serializer::Layer::Layer_MergerLayer);
+    CreateAnyLayer(flatBufferLayer.o, serializer::Layer::Layer_ConcatLayer);
 }
 
 void SerializerVisitor::VisitMultiplicationLayer(const armnn::IConnectableLayer* layer, const char* name)
diff --git a/src/armnnSerializer/Serializer.hpp b/src/armnnSerializer/Serializer.hpp
index 4a71837..2e2816a 100644
--- a/src/armnnSerializer/Serializer.hpp
+++ b/src/armnnSerializer/Serializer.hpp
@@ -61,6 +61,10 @@
                                       const armnn::ConstTensor& gamma,
                                       const char* name = nullptr) override;
 
+    void VisitConcatLayer(const armnn::IConnectableLayer* layer,
+                          const armnn::ConcatDescriptor& concatDescriptor,
+                          const char* name = nullptr) override;
+
     void VisitConstantLayer(const armnn::IConnectableLayer* layer,
                             const armnn::ConstTensor& input,
                             const char* = nullptr) override;
@@ -132,8 +136,9 @@
     void VisitMergeLayer(const armnn::IConnectableLayer* layer,
                          const char* name = nullptr) override;
 
+    ARMNN_DEPRECATED_MSG("Use VisitConcatLayer instead")
     void VisitMergerLayer(const armnn::IConnectableLayer* layer,
-                          const armnn::OriginsDescriptor& mergerDescriptor,
+                          const armnn::MergerDescriptor& mergerDescriptor,
                           const char* name = nullptr) override;
 
     void VisitMultiplicationLayer(const armnn::IConnectableLayer* layer,
diff --git a/src/armnnSerializer/SerializerSupport.md b/src/armnnSerializer/SerializerSupport.md
index f1b3365..832c1a7 100644
--- a/src/armnnSerializer/SerializerSupport.md
+++ b/src/armnnSerializer/SerializerSupport.md
@@ -26,7 +26,7 @@
 * Maximum
 * Mean
 * Merge
-* Merger
+* Concat
 * Minimum
 * Multiplication
 * Normalization
diff --git a/src/armnnSerializer/test/SerializerTests.cpp b/src/armnnSerializer/test/SerializerTests.cpp
index b21ae58..752cf0c 100644
--- a/src/armnnSerializer/test/SerializerTests.cpp
+++ b/src/armnnSerializer/test/SerializerTests.cpp
@@ -1248,6 +1248,13 @@
                           const armnn::OriginsDescriptor& descriptor,
                           const char* name) override
     {
+        throw armnn::Exception("MergerLayer should have translated to ConcatLayer");
+    }
+
+    void VisitConcatLayer(const armnn::IConnectableLayer* layer,
+                          const armnn::OriginsDescriptor& descriptor,
+                          const char* name) override
+    {
         VerifyNameAndConnections(layer, name);
         VerifyDescriptor(descriptor);
     }
@@ -1271,6 +1278,9 @@
     armnn::OriginsDescriptor m_Descriptor;
 };
 
+// NOTE: until the deprecated AddMergerLayer disappears this test checks that calling
+//       AddMergerLayer places a ConcatLayer into the serialized format and that
+//       when this deserialises we have a ConcatLayer
 BOOST_AUTO_TEST_CASE(SerializeMerger)
 {
     const std::string layerName("merger");
@@ -1309,17 +1319,10 @@
 BOOST_AUTO_TEST_CASE(EnsureMergerLayerBackwardCompatibility)
 {
     // The hex array below is a flat buffer containing a simple network with two inputs
-    // a merger layer (soon to be a thing of the past) and an output layer with dimensions
-    // as per the tensor infos below.
-    // The intention is that this test will be repurposed as soon as the MergerLayer
-    // is replaced by a ConcatLayer to verify that we can still read back these old style
+    // a merger layer (now deprecated) and an output layer with dimensions as per the tensor infos below.
+    //
+    // This test verifies that we can still read back these old style
     // models replacing the MergerLayers with ConcatLayers with the same parameters.
-    // To do this the MergerLayerVerifier will be changed to have a VisitConcatLayer
-    // which will do the work that the VisitMergerLayer currently does and the VisitMergerLayer
-    // so long as it remains (public API will drop Merger Layer at some future point)
-    // will throw an error if invoked because none of the graphs we create should contain
-    // Merger layers now regardless of whether we attempt to insert the Merger layer via
-    // the INetwork.AddMergerLayer call or by deserializing an old style flatbuffer file.
     unsigned int size = 760;
     const unsigned char mergerModel[] = {
             0x10,0x00,0x00,0x00,0x00,0x00,0x0A,0x00,0x10,0x00,0x04,0x00,0x08,0x00,0x0C,0x00,0x0A,0x00,0x00,0x00,
@@ -1381,6 +1384,41 @@
     deserializedNetwork->Accept(verifier);
 }
 
+BOOST_AUTO_TEST_CASE(SerializeConcat)
+{
+    const std::string layerName("concat");
+    const armnn::TensorInfo inputInfo = armnn::TensorInfo({2, 3, 2, 2}, armnn::DataType::Float32);
+    const armnn::TensorInfo outputInfo = armnn::TensorInfo({4, 3, 2, 2}, armnn::DataType::Float32);
+
+    const std::vector<armnn::TensorShape> shapes({inputInfo.GetShape(), inputInfo.GetShape()});
+
+    armnn::OriginsDescriptor descriptor =
+        armnn::CreateDescriptorForConcatenation(shapes.begin(), shapes.end(), 0);
+
+    armnn::INetworkPtr network = armnn::INetwork::Create();
+    armnn::IConnectableLayer* const inputLayerOne = network->AddInputLayer(0);
+    armnn::IConnectableLayer* const inputLayerTwo = network->AddInputLayer(1);
+    armnn::IConnectableLayer* const concatLayer = network->AddConcatLayer(descriptor, layerName.c_str());
+    armnn::IConnectableLayer* const outputLayer = network->AddOutputLayer(0);
+
+    inputLayerOne->GetOutputSlot(0).Connect(concatLayer->GetInputSlot(0));
+    inputLayerTwo->GetOutputSlot(0).Connect(concatLayer->GetInputSlot(1));
+    concatLayer->GetOutputSlot(0).Connect(outputLayer->GetInputSlot(0));
+
+    inputLayerOne->GetOutputSlot(0).SetTensorInfo(inputInfo);
+    inputLayerTwo->GetOutputSlot(0).SetTensorInfo(inputInfo);
+    concatLayer->GetOutputSlot(0).SetTensorInfo(outputInfo);
+
+    std::string concatLayerNetwork = SerializeNetwork(*network);
+    armnn::INetworkPtr deserializedNetwork = DeserializeNetwork(concatLayerNetwork);
+    BOOST_CHECK(deserializedNetwork);
+
+    // NOTE: using the MergerLayerVerifier to ensure that it is a concat layer and not a
+    //       merger layer that gets placed into the graph.
+    MergerLayerVerifier verifier(layerName, {inputInfo, inputInfo}, {outputInfo}, descriptor);
+    deserializedNetwork->Accept(verifier);
+}
+
 BOOST_AUTO_TEST_CASE(SerializeMinimum)
 {
     class MinimumLayerVerifier : public LayerVerifierBase
diff --git a/src/backends/backendsCommon/LayerSupportBase.cpp b/src/backends/backendsCommon/LayerSupportBase.cpp
index 9fcb496..71b1745 100644
--- a/src/backends/backendsCommon/LayerSupportBase.cpp
+++ b/src/backends/backendsCommon/LayerSupportBase.cpp
@@ -73,9 +73,7 @@
                                          const OriginsDescriptor& descriptor,
                                          Optional<std::string&> reasonIfUnsupported) const
 {
-    ARMNN_NO_DEPRECATE_WARN_BEGIN
-    return IsMergerSupported(inputs, output, descriptor, reasonIfUnsupported);
-    ARMNN_NO_DEPRECATE_WARN_END
+    return DefaultLayerSupport(__func__, __FILE__, __LINE__, reasonIfUnsupported);
 }
 
 bool LayerSupportBase::IsConstantSupported(const TensorInfo& output,
@@ -286,7 +284,7 @@
                                          const OriginsDescriptor& descriptor,
                                          Optional<std::string&> reasonIfUnsupported) const
 {
-    return DefaultLayerSupport(__func__, __FILE__, __LINE__, reasonIfUnsupported);
+    return IsConcatSupported(inputs, output, descriptor, reasonIfUnsupported);
 }
 
 bool LayerSupportBase::IsMinimumSupported(const TensorInfo& input0,
diff --git a/src/backends/backendsCommon/WorkloadData.cpp b/src/backends/backendsCommon/WorkloadData.cpp
index ea84c0b..9bb95f6 100644
--- a/src/backends/backendsCommon/WorkloadData.cpp
+++ b/src/backends/backendsCommon/WorkloadData.cpp
@@ -378,26 +378,26 @@
 }
 
 //---------------------------------------------------------------
-void MergerQueueDescriptor::Validate(const WorkloadInfo& workloadInfo) const
+void ConcatQueueDescriptor::Validate(const WorkloadInfo& workloadInfo) const
 {
-    ValidateNumOutputs(workloadInfo, "MergerQueueDescriptor", 1);
+    ValidateNumOutputs(workloadInfo, "ConcatQueueDescriptor", 1);
 
     if (m_Inputs.size() <= 0)
     {
-        throw InvalidArgumentException("MergerQueueDescriptor: At least one input needs to be provided.");
+        throw InvalidArgumentException("ConcatQueueDescriptor: At least one input needs to be provided.");
     }
     if (m_Outputs.size() <= 0)
     {
-        throw InvalidArgumentException("MergerQueueDescriptor: At least one output needs to be provided.");
+        throw InvalidArgumentException("ConcatQueueDescriptor: At least one output needs to be provided.");
     }
 
     if (workloadInfo.m_InputTensorInfos.size() <= 0)
     {
-        throw InvalidArgumentException("MergerQueueDescriptor: At least one TensorInfo input needs to be provided.");
+        throw InvalidArgumentException("ConcatQueueDescriptor: At least one TensorInfo input needs to be provided.");
     }
     if (workloadInfo.m_OutputTensorInfos.size() <= 0)
     {
-        throw InvalidArgumentException("MergerQueueDescriptor: At least one TensorInfo output needs to be provided.");
+        throw InvalidArgumentException("ConcatQueueDescriptor: At least one TensorInfo output needs to be provided.");
     }
 
     if(m_Parameters.GetConcatAxis() > workloadInfo.m_InputTensorInfos[0].GetShape().GetNumDimensions())
@@ -413,7 +413,7 @@
     if (workloadInfo.m_InputTensorInfos.size() != m_ViewOrigins.size())
     {
         throw InvalidArgumentException(
-            "MergerQueueDescriptor: Number of split windows "
+            "ConcatQueueDescriptor: Number of split windows "
             "has to match number of workloadInfo.m_InputTensorInfos. "
             "Number of windows: " +
             to_string(m_ViewOrigins.size()) +
@@ -428,7 +428,7 @@
         ViewOrigin const& e = m_ViewOrigins[w];
         if (e.m_Origin.size() != outputDims)
         {
-            throw InvalidArgumentException("MergerQueueDescriptor: Window origin have to "
+            throw InvalidArgumentException("ConcatQueueDescriptor: Window origin have to "
                                            "have the same dimensionality as the output tensor. "
                                            "Window origin (index: " +
                                            to_string(w) + ") has " + to_string(e.m_Origin.size()) +
@@ -442,7 +442,7 @@
             if (e.m_Origin[i] + workloadInfo.m_InputTensorInfos[w].GetShape()[i]
                 > workloadInfo.m_OutputTensorInfos[0].GetShape()[i])
             {
-                throw InvalidArgumentException("MergerQueueDescriptor: Window extent coordinates have to "
+                throw InvalidArgumentException("ConcatQueueDescriptor: Window extent coordinates have to "
                                                "be smaller or equal than the size of the output in that coord.");
             }
         }
@@ -463,11 +463,11 @@
     {
         ValidateDataTypes(workloadInfo.m_InputTensorInfos[i],
                           supportedTypes,
-                          "MergerQueueDescriptor");
+                          "ConcatQueueDescriptor");
     }
     ValidateDataTypes(workloadInfo.m_OutputTensorInfos[0],
                       {workloadInfo.m_InputTensorInfos[0].GetDataType()},
-                      "MergerQueueDescriptor");
+                      "ConcatQueueDescriptor");
 }
 
 //---------------------------------------------------------------
diff --git a/src/backends/backendsCommon/WorkloadData.hpp b/src/backends/backendsCommon/WorkloadData.hpp
index 689c6d2..3e33b94 100644
--- a/src/backends/backendsCommon/WorkloadData.hpp
+++ b/src/backends/backendsCommon/WorkloadData.hpp
@@ -9,6 +9,7 @@
 
 #include <InternalTypes.hpp>
 
+#include <armnn/Deprecated.hpp>
 #include <armnn/Descriptors.hpp>
 #include <armnn/Exceptions.hpp>
 #include <armnn/Types.hpp>
@@ -87,8 +88,8 @@
     void Validate(const WorkloadInfo& workloadInfo) const;
 };
 
-// Merger layer workload data.
-struct MergerQueueDescriptor : QueueDescriptorWithParameters<OriginsDescriptor>
+// Concat layer workload data.
+struct ConcatQueueDescriptor : QueueDescriptorWithParameters<OriginsDescriptor>
 {
     struct ViewOrigin
     {
@@ -106,6 +107,9 @@
     void Validate(const WorkloadInfo& workloadInfo) const;
 };
 
+// Deprecated. Use ConcatQueueDescriptor instead
+using MergerQueueDescriptor = ConcatQueueDescriptor;
+
 // Activation layer workload data.
 struct ActivationQueueDescriptor : QueueDescriptorWithParameters<ActivationDescriptor>
 {
diff --git a/src/backends/backendsCommon/WorkloadDataFwd.hpp b/src/backends/backendsCommon/WorkloadDataFwd.hpp
index 9fbd81b..abee316 100644
--- a/src/backends/backendsCommon/WorkloadDataFwd.hpp
+++ b/src/backends/backendsCommon/WorkloadDataFwd.hpp
@@ -12,7 +12,7 @@
 struct QueueDescriptorWithParameters;
 struct SoftmaxQueueDescriptor;
 struct SplitterQueueDescriptor;
-struct MergerQueueDescriptor;
+struct ConcatQueueDescriptor;
 struct ActivationQueueDescriptor;
 struct FullyConnectedQueueDescriptor;
 struct PermuteQueueDescriptor;
diff --git a/src/backends/backendsCommon/WorkloadFactory.cpp b/src/backends/backendsCommon/WorkloadFactory.cpp
index 7631071..f026e1e 100644
--- a/src/backends/backendsCommon/WorkloadFactory.cpp
+++ b/src/backends/backendsCommon/WorkloadFactory.cpp
@@ -512,9 +512,9 @@
                                                           reason);
             break;
         }
-        case LayerType::Merger:
+        case LayerType::Concat:
         {
-            auto cLayer = boost::polymorphic_downcast<const MergerLayer*>(&layer);
+            auto cLayer = boost::polymorphic_downcast<const ConcatLayer*>(&layer);
 
             // Get vector of all inputs.
             auto getTensorInfo = [&dataType](const InputSlot& slot)
@@ -535,9 +535,9 @@
 
             const TensorInfo& output = layer.GetOutputSlot(0).GetTensorInfo();
 
-            ARMNN_NO_DEPRECATE_WARN_BEGIN
-            result = layerSupportObject->IsMergerSupported(inputPtrs, output, cLayer->GetParameters(), reason);
-            ARMNN_NO_DEPRECATE_WARN_END
+            result = layerSupportObject->IsConcatSupported(inputPtrs, output, cLayer->GetParameters(), reason);
+
+
             break;
         }
         case LayerType::Multiplication:
@@ -816,7 +816,7 @@
     return std::unique_ptr<IWorkload>();
 }
 
-std::unique_ptr<IWorkload> IWorkloadFactory::CreateConcat(const MergerQueueDescriptor& descriptor,
+std::unique_ptr<IWorkload> IWorkloadFactory::CreateConcat(const ConcatQueueDescriptor& descriptor,
                                                           const WorkloadInfo& info) const
 {
     return std::unique_ptr<IWorkload>();
diff --git a/src/backends/backendsCommon/WorkloadFactory.hpp b/src/backends/backendsCommon/WorkloadFactory.hpp
index 0b0ba7d..11c36eb 100644
--- a/src/backends/backendsCommon/WorkloadFactory.hpp
+++ b/src/backends/backendsCommon/WorkloadFactory.hpp
@@ -61,7 +61,7 @@
     virtual std::unique_ptr<IWorkload> CreateBatchToSpaceNd(const BatchToSpaceNdQueueDescriptor& descriptor,
                                                             const WorkloadInfo& Info) const;
 
-    virtual std::unique_ptr<IWorkload> CreateConcat(const MergerQueueDescriptor& descriptor,
+    virtual std::unique_ptr<IWorkload> CreateConcat(const ConcatQueueDescriptor& descriptor,
                                                     const WorkloadInfo&          info) const;
 
     virtual std::unique_ptr<IWorkload> CreateConstant(const ConstantQueueDescriptor& descriptor,
diff --git a/src/backends/backendsCommon/test/CMakeLists.txt b/src/backends/backendsCommon/test/CMakeLists.txt
index 8050a0a..508fc77 100644
--- a/src/backends/backendsCommon/test/CMakeLists.txt
+++ b/src/backends/backendsCommon/test/CMakeLists.txt
@@ -30,7 +30,7 @@
     LayerTests.hpp
     LstmTestImpl.hpp
     NormTestImpl.hpp
-    MergerTestImpl.hpp
+    ConcatTestImpl.hpp
     MockBackend.cpp
     MockBackend.hpp
     MockBackendId.hpp
diff --git a/src/backends/backendsCommon/test/MergerTestImpl.hpp b/src/backends/backendsCommon/test/ConcatTestImpl.hpp
similarity index 88%
rename from src/backends/backendsCommon/test/MergerTestImpl.hpp
rename to src/backends/backendsCommon/test/ConcatTestImpl.hpp
index 8483cf0..ded3857 100644
--- a/src/backends/backendsCommon/test/MergerTestImpl.hpp
+++ b/src/backends/backendsCommon/test/ConcatTestImpl.hpp
@@ -18,8 +18,8 @@
 {
 
 template<typename armnn::DataType DataType>
-INetworkPtr CreateMergerNetwork(const std::vector<TensorShape>& inputShapes,
-                                const TensorShape& outputShape,
+INetworkPtr CreateConcatNetwork(const std::vector<TensorShape>& inputShapes,
+                                const TensorShape &outputShape,
                                 unsigned int concatAxis,
                                 const float qScale = 1.0f,
                                 const int32_t qOffset = 0)
@@ -33,26 +33,24 @@
     descriptor = CreateDescriptorForConcatenation(inputShapes.begin(),
                                                   inputShapes.end(),
                                                   concatAxis);
-    ARMNN_NO_DEPRECATE_WARN_BEGIN
-    IConnectableLayer* merger = net->AddMergerLayer(descriptor, "merger");
-    ARMNN_NO_DEPRECATE_WARN_END
+    IConnectableLayer* concat = net->AddConcatLayer(descriptor, "concat");
 
     for (unsigned int i = 0; i < inputShapes.size(); ++i)
     {
         TensorInfo inputTensorInfo(inputShapes[i], DataType, qScale, qOffset);
         IConnectableLayer* input = net->AddInputLayer(boost::numeric_cast<LayerBindingId>(i));
-        Connect(input, merger, inputTensorInfo, 0, i);
+        Connect(input, concat, inputTensorInfo, 0, i);
     }
 
     TensorInfo outputTensorInfo(outputShape, DataType, qScale, qOffset);
     IConnectableLayer* output = net->AddOutputLayer(0, "output");
-    Connect(merger, output, outputTensorInfo, 0, 0);
+    Connect(concat, output, outputTensorInfo, 0, 0);
 
     return net;
 }
 
 template<armnn::DataType ArmnnType>
-void MergerDim0EndToEnd(const std::vector<BackendId>& backends)
+void ConcatDim0EndToEnd(const std::vector<BackendId>& backends)
 {
     using namespace armnn;
     using T = ResolveType<ArmnnType>;
@@ -62,7 +60,7 @@
     const TensorShape& outputShape = { 4, 3, 2, 2 };
 
     // Builds up the structure of the network
-    INetworkPtr net = CreateMergerNetwork<ArmnnType>(inputShapes, outputShape, concatAxis);
+    INetworkPtr net = CreateConcatNetwork<ArmnnType>(inputShapes, outputShape, concatAxis);
 
     BOOST_TEST_CHECKPOINT("create a network");
 
@@ -116,7 +114,7 @@
 }
 
 template<armnn::DataType ArmnnType>
-void MergerDim1EndToEnd(const std::vector<BackendId>& backends)
+void ConcatDim1EndToEnd(const std::vector<BackendId>& backends)
 {
     using namespace armnn;
     using T = ResolveType<ArmnnType>;
@@ -126,7 +124,7 @@
     const TensorShape& outputShape = { 2, 6, 2, 2 };
 
     // Builds up the structure of the network
-    INetworkPtr net = CreateMergerNetwork<ArmnnType>(inputShapes, outputShape, concatAxis);
+    INetworkPtr net = CreateConcatNetwork<ArmnnType>(inputShapes, outputShape, concatAxis);
 
     BOOST_TEST_CHECKPOINT("create a network");
 
@@ -180,7 +178,7 @@
 }
 
 template<armnn::DataType ArmnnType>
-void MergerDim2EndToEnd(const std::vector<BackendId>& backends)
+void ConcatDim2EndToEnd(const std::vector<BackendId>& backends)
 {
     using namespace armnn;
     using T = ResolveType<ArmnnType>;
@@ -190,7 +188,7 @@
     const TensorShape& outputShape = { 2, 3, 4, 2 };
 
     // Builds up the structure of the network
-    INetworkPtr net = CreateMergerNetwork<ArmnnType>(inputShapes, outputShape, concatAxis);
+    INetworkPtr net = CreateConcatNetwork<ArmnnType>(inputShapes, outputShape, concatAxis);
 
     BOOST_TEST_CHECKPOINT("create a network");
 
@@ -244,7 +242,7 @@
 }
 
 template<armnn::DataType ArmnnType, typename T = armnn::ResolveType<ArmnnType>>
-void MergerDim3EndToEnd(const std::vector<BackendId>& backends)
+void ConcatDim3EndToEnd(const std::vector<BackendId>& backends)
 {
     using namespace armnn;
 
@@ -253,7 +251,7 @@
     const TensorShape& outputShape = { 2, 3, 2, 4 };
 
     // Builds up the structure of the network
-    INetworkPtr net = CreateMergerNetwork<ArmnnType>(inputShapes, outputShape, concatAxis);
+    INetworkPtr net = CreateConcatNetwork<ArmnnType>(inputShapes, outputShape, concatAxis);
 
     BOOST_TEST_CHECKPOINT("create a network");
 
diff --git a/src/backends/backendsCommon/test/IsLayerSupportedTestImpl.hpp b/src/backends/backendsCommon/test/IsLayerSupportedTestImpl.hpp
index 3ff7376..7161464 100644
--- a/src/backends/backendsCommon/test/IsLayerSupportedTestImpl.hpp
+++ b/src/backends/backendsCommon/test/IsLayerSupportedTestImpl.hpp
@@ -135,19 +135,19 @@
 };
 
 template<>
-struct DummyLayer<armnn::MergerLayer>
+struct DummyLayer<armnn::ConcatLayer>
 {
     DummyLayer()
     {
         armnn::OriginsDescriptor desc(2);
-        m_Layer = dummyGraph.AddLayer<armnn::MergerLayer>(desc, "");
+        m_Layer = dummyGraph.AddLayer<armnn::ConcatLayer>(desc, "");
 
     }
     ~DummyLayer()
     {
         dummyGraph.EraseLayer(m_Layer);
     }
-    armnn::MergerLayer* m_Layer;
+    armnn::ConcatLayer* m_Layer;
 };
 
 template<>
@@ -322,6 +322,8 @@
 
 DECLARE_LAYER_POLICY_2_PARAM(BatchToSpaceNd)
 
+DECLARE_LAYER_POLICY_2_PARAM(Concat)
+
 DECLARE_LAYER_POLICY_1_PARAM(Constant)
 
 DECLARE_LAYER_POLICY_1_PARAM(ConvertFp16ToFp32)
@@ -364,10 +366,6 @@
 
 DECLARE_LAYER_POLICY_1_PARAM(Merge)
 
-ARMNN_NO_DEPRECATE_WARN_BEGIN
-DECLARE_LAYER_POLICY_2_PARAM(Merger)
-ARMNN_NO_DEPRECATE_WARN_END
-
 DECLARE_LAYER_POLICY_1_PARAM(Minimum)
 
 DECLARE_LAYER_POLICY_1_PARAM(Multiplication)
@@ -422,7 +420,7 @@
 }
 
 template<>
-unsigned int GetNumInputs<armnn::LayerType::Merger>(const armnn::Layer& layer)
+unsigned int GetNumInputs<armnn::LayerType::Concat>(const armnn::Layer& layer)
 {
     boost::ignore_unused(layer);
     return 2;
diff --git a/src/backends/backendsCommon/test/LayerTests.cpp b/src/backends/backendsCommon/test/LayerTests.cpp
index c84a530..402e86d 100644
--- a/src/backends/backendsCommon/test/LayerTests.cpp
+++ b/src/backends/backendsCommon/test/LayerTests.cpp
@@ -1362,10 +1362,10 @@
     );
 
     std::vector<unsigned int> wOrigin1 = {0, 0, 0}; //Extent of the window is defined by size of input[0].
-    armnn::MergerQueueDescriptor::ViewOrigin window1(wOrigin1);
+    armnn::ConcatQueueDescriptor::ViewOrigin window1(wOrigin1);
 
     std::vector<unsigned int> wOrigin2 = {2, 0, 0}; //Extent of the window is defined by size of input[1].
-    armnn::MergerQueueDescriptor::ViewOrigin window2(wOrigin2);
+    armnn::ConcatQueueDescriptor::ViewOrigin window2(wOrigin2);
 
     std::unique_ptr<armnn::ITensorHandle> outputHandle = workloadFactory.CreateTensorHandle(outputTensorInfo);
 
@@ -1381,7 +1381,7 @@
             workloadFactory.CreateSubTensorHandle(*outputHandle, inputTensorInfo2.GetShape(), wOrigin2.data()) :
             workloadFactory.CreateTensorHandle(inputTensorInfo2);
 
-    armnn::MergerQueueDescriptor data;
+    armnn::ConcatQueueDescriptor data;
     armnn::WorkloadInfo info;
     AddInputToWorkload(data, info, inputTensorInfo1, inputHandle1.get());
     AddInputToWorkload(data, info, inputTensorInfo2, inputHandle2.get());
@@ -3554,7 +3554,7 @@
 
     std::unique_ptr<armnn::ITensorHandle> outputHandle = workloadFactory.CreateTensorHandle(outputTensorInfo);
 
-    armnn::MergerQueueDescriptor queueDescriptor;
+    armnn::ConcatQueueDescriptor queueDescriptor;
     armnn::OriginsDescriptor viewsDescriptor = CreateDescriptorForConcatenation(inputTensorInfos, concatDim);
     queueDescriptor.m_Parameters = viewsDescriptor;
 
@@ -6625,10 +6625,10 @@
     inputTensorInfo2.SetQuantizationOffset(inputOffset2);
 
     std::vector<unsigned int> wOrigin1 = { 0, 0, 0 }; //Extent of the window is defined by size of input[0].
-    armnn::MergerQueueDescriptor::ViewOrigin window1(wOrigin1);
+    armnn::ConcatQueueDescriptor::ViewOrigin window1(wOrigin1);
 
     std::vector<unsigned int> wOrigin2 = { 2, 0, 0 }; //Extent of the window is defined by size of input[1].
-    armnn::MergerQueueDescriptor::ViewOrigin window2(wOrigin2);
+    armnn::ConcatQueueDescriptor::ViewOrigin window2(wOrigin2);
 
     std::unique_ptr<armnn::ITensorHandle> outputHandle = workloadFactory.CreateTensorHandle(outputTensorInfo);
 
@@ -6644,7 +6644,7 @@
             workloadFactory.CreateSubTensorHandle(*outputHandle, inputTensorInfo2.GetShape(), wOrigin2.data()) :
             workloadFactory.CreateTensorHandle(inputTensorInfo2);
 
-    armnn::MergerQueueDescriptor data;
+    armnn::ConcatQueueDescriptor data;
     armnn::WorkloadInfo info;
     AddInputToWorkload(data, info, inputTensorInfo1, inputHandle1.get());
     AddInputToWorkload(data, info, inputTensorInfo2, inputHandle2.get());
@@ -6759,10 +6759,10 @@
     );
 
     std::vector<unsigned int> wOrigin1 = { 0, 0, 0 }; //Extent of the window is defined by size of input[0].
-    armnn::MergerQueueDescriptor::ViewOrigin window1(wOrigin1);
+    armnn::ConcatQueueDescriptor::ViewOrigin window1(wOrigin1);
 
     std::vector<unsigned int> wOrigin2 = { 2, 0, 0 }; //Extent of the window is defined by size of input[1].
-    armnn::MergerQueueDescriptor::ViewOrigin window2(wOrigin2);
+    armnn::ConcatQueueDescriptor::ViewOrigin window2(wOrigin2);
 
 
     std::unique_ptr<armnn::ITensorHandle> outputHandle = workloadFactory.CreateTensorHandle(outputTensorInfo);
@@ -6780,7 +6780,7 @@
             workloadFactory.CreateTensorHandle(inputTensorInfo2);
 
 
-    armnn::MergerQueueDescriptor data;
+    armnn::ConcatQueueDescriptor data;
     armnn::WorkloadInfo info;
     AddInputToWorkload(data, info, inputTensorInfo1, inputHandle1.get());
     AddInputToWorkload(data, info, inputTensorInfo2, inputHandle2.get());
@@ -6892,10 +6892,10 @@
     }));
 
     std::vector<unsigned int> wOrigin1 = { 0, 0, 0 }; //Extent of the window is defined by size of input[0].
-    armnn::MergerQueueDescriptor::ViewOrigin window1(wOrigin1);
+    armnn::ConcatQueueDescriptor::ViewOrigin window1(wOrigin1);
 
     std::vector<unsigned int> wOrigin2 = { 2, 0, 0 }; //Extent of the window is defined by size of input[1].
-    armnn::MergerQueueDescriptor::ViewOrigin window2(wOrigin2);
+    armnn::ConcatQueueDescriptor::ViewOrigin window2(wOrigin2);
 
 
     std::unique_ptr<armnn::ITensorHandle> outputHandle = workloadFactory.CreateTensorHandle(outputTensorInfo);
@@ -6913,7 +6913,7 @@
             workloadFactory.CreateTensorHandle(inputTensorInfo2);
 
 
-    armnn::MergerQueueDescriptor data;
+    armnn::ConcatQueueDescriptor data;
     armnn::WorkloadInfo info;
     AddInputToWorkload(data, info, inputTensorInfo1, inputHandle1.get());
     AddInputToWorkload(data, info, inputTensorInfo2, inputHandle2.get());
diff --git a/src/backends/backendsCommon/test/QuantizeHelper.hpp b/src/backends/backendsCommon/test/QuantizeHelper.hpp
index b3b0631..a0c6553 100644
--- a/src/backends/backendsCommon/test/QuantizeHelper.hpp
+++ b/src/backends/backendsCommon/test/QuantizeHelper.hpp
@@ -2,6 +2,7 @@
 // Copyright © 2017 Arm Ltd. All rights reserved.
 // SPDX-License-Identifier: MIT
 //
+
 #pragma once
 
 #include <armnn/ArmNN.hpp>
diff --git a/src/backends/backendsCommon/test/WorkloadDataValidation.cpp b/src/backends/backendsCommon/test/WorkloadDataValidation.cpp
index 067cca8..94bef9b 100644
--- a/src/backends/backendsCommon/test/WorkloadDataValidation.cpp
+++ b/src/backends/backendsCommon/test/WorkloadDataValidation.cpp
@@ -234,7 +234,7 @@
 }
 
 
-BOOST_AUTO_TEST_CASE(MergerQueueDescriptor_Validate_WrongWindow)
+BOOST_AUTO_TEST_CASE(ConcatQueueDescriptor_Validate_WrongWindow)
 {
     constexpr unsigned int inputNum = 1;
     constexpr unsigned int inputChannels = 3;
@@ -256,7 +256,7 @@
     inputTensorInfo = armnn::TensorInfo(4, inputShape, armnn::DataType::Float32);
     outputTensorInfo = armnn::TensorInfo(4, outputShape, armnn::DataType::Float32);
 
-    MergerQueueDescriptor invalidData;
+    ConcatQueueDescriptor invalidData;
     WorkloadInfo          invalidInfo;
 
     AddInputToWorkload(invalidData, invalidInfo, inputTensorInfo, nullptr);
@@ -264,7 +264,7 @@
 
     // Invalid, since it has only 3 dimensions while the input tensor is 4d.
     std::vector<unsigned int> wOrigin = {0, 0, 0};
-    armnn::MergerQueueDescriptor::ViewOrigin window(wOrigin);
+    armnn::ConcatQueueDescriptor::ViewOrigin window(wOrigin);
     invalidData.m_ViewOrigins.push_back(window);
 
     BOOST_TEST_INFO("Invalid argument exception is expected, because merge window dimensionality does not "
@@ -273,18 +273,18 @@
 
     // Invalid, since window extends past the boundary of output tensor.
     std::vector<unsigned int> wOrigin3 = {0, 0, 15, 0};
-    armnn::MergerQueueDescriptor::ViewOrigin window3(wOrigin3);
+    armnn::ConcatQueueDescriptor::ViewOrigin window3(wOrigin3);
     invalidData.m_ViewOrigins[0] = window3;
     BOOST_TEST_INFO("Invalid argument exception is expected (wOrigin3[2]+ inputHeight > outputHeight");
     BOOST_CHECK_THROW(RefConcatWorkload(invalidData, invalidInfo), armnn::InvalidArgumentException);
 
 
     std::vector<unsigned int> wOrigin4 = {0, 0, 0, 0};
-    armnn::MergerQueueDescriptor::ViewOrigin window4(wOrigin4);
+    armnn::ConcatQueueDescriptor::ViewOrigin window4(wOrigin4);
     invalidData.m_ViewOrigins[0] = window4;
 
     std::vector<unsigned int> wOrigin5 = {1, 16, 20, 2};
-    armnn::MergerQueueDescriptor::ViewOrigin window5(wOrigin4);
+    armnn::ConcatQueueDescriptor::ViewOrigin window5(wOrigin4);
     invalidData.m_ViewOrigins.push_back(window5);
 
     BOOST_TEST_INFO("Invalid exception due to number of merge windows not matching number of inputs.");
diff --git a/src/backends/cl/ClLayerSupport.cpp b/src/backends/cl/ClLayerSupport.cpp
index dfac289..78ac0e6 100644
--- a/src/backends/cl/ClLayerSupport.cpp
+++ b/src/backends/cl/ClLayerSupport.cpp
@@ -189,12 +189,43 @@
 
 bool ClLayerSupport::IsConcatSupported(const std::vector<const TensorInfo*> inputs,
                                        const TensorInfo& output,
-                                       const OriginsDescriptor& descriptor,
+                                       const ConcatDescriptor& descriptor,
                                        Optional<std::string&> reasonIfUnsupported) const
 {
-    ARMNN_NO_DEPRECATE_WARN_BEGIN
-    return IsMergerSupported(inputs, output, descriptor, reasonIfUnsupported);
-    ARMNN_NO_DEPRECATE_WARN_END
+    if (descriptor.GetNumDimensions() <= descriptor.GetConcatAxis())
+    {
+        SetValueChecked(reasonIfUnsupported, "Cl Concat: Concat axis > Number of dimensions.");
+        return false;
+    }
+
+    unsigned int concatInnerAxis = (descriptor.GetNumDimensions() - descriptor.GetConcatAxis()) - 1;
+    if(concatInnerAxis < 3) // Width, height, or channels
+    {
+        FORWARD_WORKLOAD_VALIDATE_FUNC(ClConcatWorkloadValidate,
+                                       reasonIfUnsupported,
+                                       inputs,
+                                       output,
+                                       descriptor);
+    }
+    else if (concatInnerAxis == 3)
+    {
+        // We rely on the sub-tensor optimization to handle the batch dimension for 4D tensors. If we can't use
+        // sub-tensors for this then we can't support it. Here is where we check that the sub-tensors will work.
+        for (auto& input : inputs)
+        {
+            if (input && !output.IsTypeSpaceMatch(*input)) // Cannot use sub-tensors if the types are not same space
+            {
+                SetValueChecked(reasonIfUnsupported, "Cl Concat: Types and quantization parameters must match.");
+                return false;
+            }
+        }
+        return true; // Sub-tensors support concat along batch
+    }
+    else // > 4 dimensions not supported.
+    {
+        SetValueChecked(reasonIfUnsupported, "Cl Concat: Maximum of 4 dimensions supported.");
+        return false;
+    }
 }
 
 bool ClLayerSupport::IsConstantSupported(const TensorInfo& output,
@@ -442,43 +473,10 @@
 
 bool ClLayerSupport::IsMergerSupported(const std::vector<const TensorInfo*> inputs,
                                        const TensorInfo& output,
-                                       const OriginsDescriptor& descriptor,
+                                       const MergerDescriptor& descriptor,
                                        Optional<std::string&> reasonIfUnsupported) const
 {
-    if (descriptor.GetNumDimensions() <= descriptor.GetConcatAxis())
-    {
-        SetValueChecked(reasonIfUnsupported, "Cl Merger: Concat axis > Number of dimensions.");
-        return false;
-    }
-
-    unsigned int concatInnerAxis = (descriptor.GetNumDimensions() - descriptor.GetConcatAxis()) - 1;
-    if(concatInnerAxis < 3) // Width, height, or channels
-    {
-        FORWARD_WORKLOAD_VALIDATE_FUNC(ClConcatWorkloadValidate,
-                                       reasonIfUnsupported,
-                                       inputs,
-                                       output,
-                                       descriptor);
-    }
-    else if (concatInnerAxis == 3)
-    {
-        // We rely on the sub-tensor optimization to handle the batch dimension for 4D tensors. If we can't use
-        // sub-tensors for this then we can't support it. Here is where we check that the sub-tensors will work.
-        for (auto& input : inputs)
-        {
-            if (input && !output.IsTypeSpaceMatch(*input)) // Cannot use sub-tensors if the types are not same space
-            {
-                SetValueChecked(reasonIfUnsupported, "Cl Merger: Types and quantization parameters must match.");
-                return false;
-            }
-        }
-        return true; // Sub-tensors support concat along batch
-    }
-    else // > 4 dimensions not supported.
-    {
-        SetValueChecked(reasonIfUnsupported, "Cl Merger: Maximum of 4 dimensions supported.");
-        return false;
-    }
+    return IsConcatSupported(inputs, output, descriptor, reasonIfUnsupported);
 }
 
 bool ClLayerSupport::IsMinimumSupported(const TensorInfo& input0,
diff --git a/src/backends/cl/ClLayerSupport.hpp b/src/backends/cl/ClLayerSupport.hpp
index fca0bfd..64c1079 100644
--- a/src/backends/cl/ClLayerSupport.hpp
+++ b/src/backends/cl/ClLayerSupport.hpp
@@ -38,7 +38,7 @@
 
     bool IsConcatSupported(const std::vector<const TensorInfo*> inputs,
                            const TensorInfo& output,
-                           const OriginsDescriptor& descriptor,
+                           const ConcatDescriptor& descriptor,
                            Optional<std::string&> reasonIfUnsupported = EmptyOptional()) const override;
 
     bool IsConstantSupported(const TensorInfo& output,
@@ -146,7 +146,7 @@
     ARMNN_DEPRECATED_MSG("Use IsConcatSupported instead")
     bool IsMergerSupported(const std::vector<const TensorInfo*> inputs,
                            const TensorInfo& output,
-                           const OriginsDescriptor& descriptor,
+                           const MergerDescriptor& descriptor,
                            Optional<std::string&> reasonIfUnsupported = EmptyOptional()) const override;
 
     bool IsMinimumSupported(const TensorInfo& input0,
diff --git a/src/backends/cl/ClWorkloadFactory.cpp b/src/backends/cl/ClWorkloadFactory.cpp
index e7cf191..214b88d 100644
--- a/src/backends/cl/ClWorkloadFactory.cpp
+++ b/src/backends/cl/ClWorkloadFactory.cpp
@@ -265,7 +265,7 @@
     return MakeWorkload<ClL2NormalizationFloatWorkload, NullWorkload>(descriptor, info);
 }
 
-std::unique_ptr<armnn::IWorkload> ClWorkloadFactory::CreateConcat(const MergerQueueDescriptor& descriptor,
+std::unique_ptr<armnn::IWorkload> ClWorkloadFactory::CreateConcat(const ConcatQueueDescriptor& descriptor,
                                                                   const WorkloadInfo&          info) const
 {
     return MakeWorkload<ClConcatWorkload>(descriptor, info);
diff --git a/src/backends/cl/ClWorkloadFactory.hpp b/src/backends/cl/ClWorkloadFactory.hpp
index e00672f..2722171 100644
--- a/src/backends/cl/ClWorkloadFactory.hpp
+++ b/src/backends/cl/ClWorkloadFactory.hpp
@@ -97,7 +97,7 @@
     std::unique_ptr<IWorkload> CreateL2Normalization(const L2NormalizationQueueDescriptor& descriptor,
                                                      const WorkloadInfo& info) const override;
 
-    std::unique_ptr<IWorkload> CreateConcat(const MergerQueueDescriptor& descriptor,
+    std::unique_ptr<IWorkload> CreateConcat(const ConcatQueueDescriptor& descriptor,
                                             const WorkloadInfo& info) const override;
 
     std::unique_ptr<IWorkload> CreateConstant(const ConstantQueueDescriptor& descriptor,
diff --git a/src/backends/cl/test/ClCreateWorkloadTests.cpp b/src/backends/cl/test/ClCreateWorkloadTests.cpp
index 7f08b80..dc884e0 100644
--- a/src/backends/cl/test/ClCreateWorkloadTests.cpp
+++ b/src/backends/cl/test/ClCreateWorkloadTests.cpp
@@ -551,30 +551,30 @@
 }
 
 template <typename armnn::DataType DataType>
-static void ClSplitterMergerTest()
+static void ClSplitterConcatTest()
 {
     // Tests that it is possible to decide which output of the splitter layer
-    // should be lined to which input of the merger layer.
+    // should be lined to which input of the concat layer.
     // We test that is is possible to specify 0th output
-    // of the splitter to be the 1st input to the merger and the 1st output of the splitter  to be 0th input
-    // of the merger.
+    // of the splitter to be the 1st input to the concat and the 1st output of the splitter  to be 0th input
+    // of the concat.
 
     Graph graph;
     ClWorkloadFactory factory =
         ClWorkloadFactoryHelper::GetFactory(ClWorkloadFactoryHelper::GetMemoryManager());
 
     auto workloads =
-        CreateSplitterMergerWorkloadTest<ClSplitterWorkload, ClConcatWorkload, DataType>
+        CreateSplitterConcatWorkloadTest<ClSplitterWorkload, ClConcatWorkload, DataType>
             (factory, graph);
 
     auto wlSplitter = std::move(workloads.first);
-    auto wlMerger = std::move(workloads.second);
+    auto wlConcat = std::move(workloads.second);
 
     //Checks that the index of inputs/outputs matches what we declared on InputDescriptor construction.
     armnn::ClSubTensorHandle* sOut0 = dynamic_cast<armnn::ClSubTensorHandle*>(wlSplitter->GetData().m_Outputs[0]);
     armnn::ClSubTensorHandle* sOut1 = dynamic_cast<armnn::ClSubTensorHandle*>(wlSplitter->GetData().m_Outputs[1]);
-    armnn::ClSubTensorHandle* mIn0 = dynamic_cast<armnn::ClSubTensorHandle*>(wlMerger->GetData().m_Inputs[0]);
-    armnn::ClSubTensorHandle* mIn1 = dynamic_cast<armnn::ClSubTensorHandle*>(wlMerger->GetData().m_Inputs[1]);
+    armnn::ClSubTensorHandle* mIn0 = dynamic_cast<armnn::ClSubTensorHandle*>(wlConcat->GetData().m_Inputs[0]);
+    armnn::ClSubTensorHandle* mIn1 = dynamic_cast<armnn::ClSubTensorHandle*>(wlConcat->GetData().m_Inputs[1]);
 
     BOOST_TEST(sOut0);
     BOOST_TEST(sOut1);
@@ -593,14 +593,14 @@
     BOOST_TEST(validSubTensorParents);
 }
 
-BOOST_AUTO_TEST_CASE(CreateSplitterMergerFloatWorkload)
+BOOST_AUTO_TEST_CASE(CreateSplitterConcatFloatWorkload)
 {
-    ClSplitterMergerTest<armnn::DataType::Float32>();
+    ClSplitterConcatTest<armnn::DataType::Float32>();
 }
 
-BOOST_AUTO_TEST_CASE(CreateSplitterMergerFloat16Workload)
+BOOST_AUTO_TEST_CASE(CreateSplitterConcatFloat16Workload)
 {
-    ClSplitterMergerTest<armnn::DataType::Float16>();
+    ClSplitterConcatTest<armnn::DataType::Float16>();
 }
 
 
@@ -801,17 +801,17 @@
     ClMeanWorkloadTest<ClMeanWorkload, armnn::DataType::QuantisedAsymm8>();
 }
 
-template <typename MergerWorkloadType, armnn::DataType DataType>
-static void ClCreateMergerWorkloadTest(std::initializer_list<unsigned int> outputShape,
+template <typename ConcatWorkloadType, armnn::DataType DataType>
+static void ClCreateConcatWorkloadTest(std::initializer_list<unsigned int> outputShape,
                                        unsigned int concatAxis)
 {
     Graph graph;
     ClWorkloadFactory factory =
         ClWorkloadFactoryHelper::GetFactory(ClWorkloadFactoryHelper::GetMemoryManager());
 
-    auto workload = CreateMergerWorkloadTest<MergerWorkloadType, DataType>(factory, graph, outputShape, concatAxis);
+    auto workload = CreateConcatWorkloadTest<ConcatWorkloadType, DataType>(factory, graph, outputShape, concatAxis);
 
-    MergerQueueDescriptor queueDescriptor = workload->GetData();
+    ConcatQueueDescriptor queueDescriptor = workload->GetData();
     auto inputHandle0  = boost::polymorphic_downcast<IClTensorHandle*>(queueDescriptor.m_Inputs[0]);
     auto inputHandle1  = boost::polymorphic_downcast<IClTensorHandle*>(queueDescriptor.m_Inputs[1]);
     auto outputHandle = boost::polymorphic_downcast<IClTensorHandle*>(queueDescriptor.m_Outputs[0]);
@@ -821,34 +821,34 @@
     BOOST_TEST(CompareIClTensorHandleShape(outputHandle, outputShape));
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim0Float32Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim0Float32Workload)
 {
-    ClCreateMergerWorkloadTest<ClConcatWorkload, armnn::DataType::Float32>({ 4, 3, 2, 5 }, 0);
+    ClCreateConcatWorkloadTest<ClConcatWorkload, armnn::DataType::Float32>({ 4, 3, 2, 5 }, 0);
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim1Float32Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim1Float32Workload)
 {
-    ClCreateMergerWorkloadTest<ClConcatWorkload, armnn::DataType::Float32>({ 2, 6, 2, 5 }, 1);
+    ClCreateConcatWorkloadTest<ClConcatWorkload, armnn::DataType::Float32>({ 2, 6, 2, 5 }, 1);
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim3Float32Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim3Float32Workload)
 {
-    ClCreateMergerWorkloadTest<ClConcatWorkload, armnn::DataType::Float32>({ 2, 3, 2, 10 }, 3);
+    ClCreateConcatWorkloadTest<ClConcatWorkload, armnn::DataType::Float32>({ 2, 3, 2, 10 }, 3);
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim0Uint8Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim0Uint8Workload)
 {
-    ClCreateMergerWorkloadTest<ClConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 4, 3, 2, 5 }, 0);
+    ClCreateConcatWorkloadTest<ClConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 4, 3, 2, 5 }, 0);
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim1Uint8Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim1Uint8Workload)
 {
-    ClCreateMergerWorkloadTest<ClConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 2, 6, 2, 5 }, 1);
+    ClCreateConcatWorkloadTest<ClConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 2, 6, 2, 5 }, 1);
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim3Uint8Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim3Uint8Workload)
 {
-    ClCreateMergerWorkloadTest<ClConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 2, 3, 2, 10 }, 3);
+    ClCreateConcatWorkloadTest<ClConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 2, 3, 2, 10 }, 3);
 }
 
 BOOST_AUTO_TEST_SUITE_END()
diff --git a/src/backends/cl/test/ClEndToEndTests.cpp b/src/backends/cl/test/ClEndToEndTests.cpp
index 9c010fc..3235f26 100644
--- a/src/backends/cl/test/ClEndToEndTests.cpp
+++ b/src/backends/cl/test/ClEndToEndTests.cpp
@@ -4,7 +4,7 @@
 //
 
 #include <backendsCommon/test/EndToEndTestImpl.hpp>
-#include <backendsCommon/test/MergerTestImpl.hpp>
+#include <backendsCommon/test/ConcatTestImpl.hpp>
 #include <backendsCommon/test/ArithmeticTestImpl.hpp>
 #include <backendsCommon/test/SplitterEndToEndTestImpl.hpp>
 
@@ -19,34 +19,34 @@
     ConstantUsageFloat32Test(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(ClMergerEndToEndDim0Test)
+BOOST_AUTO_TEST_CASE(ClConcatEndToEndDim0Test)
 {
-    MergerDim0EndToEnd<armnn::DataType::Float32>(defaultBackends);
+    ConcatDim0EndToEnd<armnn::DataType::Float32>(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(ClMergerEndToEndDim0Uint8Test)
+BOOST_AUTO_TEST_CASE(ClConcatEndToEndDim0Uint8Test)
 {
-    MergerDim0EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
+    ConcatDim0EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(ClMergerEndToEndDim1Test)
+BOOST_AUTO_TEST_CASE(ClConcatEndToEndDim1Test)
 {
-    MergerDim1EndToEnd<armnn::DataType::Float32>(defaultBackends);
+    ConcatDim1EndToEnd<armnn::DataType::Float32>(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(ClMergerEndToEndDim1Uint8Test)
+BOOST_AUTO_TEST_CASE(ClConcatEndToEndDim1Uint8Test)
 {
-    MergerDim1EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
+    ConcatDim1EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(ClMergerEndToEndDim3Test)
+BOOST_AUTO_TEST_CASE(ClConcatEndToEndDim3Test)
 {
-    MergerDim3EndToEnd<armnn::DataType::Float32>(defaultBackends);
+    ConcatDim3EndToEnd<armnn::DataType::Float32>(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(ClMergerEndToEndDim3Uint8Test)
+BOOST_AUTO_TEST_CASE(ClConcatEndToEndDim3Uint8Test)
 {
-    MergerDim3EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
+    ConcatDim3EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
 }
 
 BOOST_AUTO_TEST_CASE(ClGreaterSimpleEndToEndTest)
diff --git a/src/backends/cl/workloads/ClConcatWorkload.cpp b/src/backends/cl/workloads/ClConcatWorkload.cpp
index ee4ba6b..fb28946 100644
--- a/src/backends/cl/workloads/ClConcatWorkload.cpp
+++ b/src/backends/cl/workloads/ClConcatWorkload.cpp
@@ -19,7 +19,7 @@
 
 namespace
 {
-size_t CalcAxis(const MergerDescriptor& desc)
+size_t CalcAxis(const OriginsDescriptor& desc)
 {
     return (desc.GetNumDimensions() - desc.GetConcatAxis()) - 1;
 }
@@ -27,7 +27,7 @@
 
 arm_compute::Status ClConcatWorkloadValidate(const std::vector<const TensorInfo*>& inputs,
                                              const TensorInfo& output,
-                                             const MergerDescriptor& descriptor)
+                                             const OriginsDescriptor& descriptor)
 {
     std::vector<arm_compute::TensorInfo> aclInputs;
     for (const TensorInfo* input : inputs)
@@ -46,8 +46,8 @@
     return arm_compute::CLConcatenateLayer::validate(aclInputPtrs, &aclOutputInfo, aclAxis);
 }
 
-ClConcatWorkload::ClConcatWorkload(const MergerQueueDescriptor& descriptor, const WorkloadInfo& info)
-: BaseWorkload<MergerQueueDescriptor>(descriptor, info)
+ClConcatWorkload::ClConcatWorkload(const ConcatQueueDescriptor& descriptor, const WorkloadInfo& info)
+: BaseWorkload<ConcatQueueDescriptor>(descriptor, info)
 {
     bool allInputsAreSubtensors = true;
 
@@ -56,7 +56,7 @@
     {
         if (!input->GetParent())
         {
-            // Non sub-tensor input found so we need to execute the merger function
+            // Non sub-tensor input found so we need to execute the concat function
             allInputsAreSubtensors = false;
             break;
         }
@@ -64,7 +64,7 @@
 
     if (allInputsAreSubtensors)
     {
-        // Can skip configuring the merger function since it's not executed
+        // Can skip configuring the concat function since it's not executed
         return;
     }
 
diff --git a/src/backends/cl/workloads/ClConcatWorkload.hpp b/src/backends/cl/workloads/ClConcatWorkload.hpp
index 106193d..c34de9f 100644
--- a/src/backends/cl/workloads/ClConcatWorkload.hpp
+++ b/src/backends/cl/workloads/ClConcatWorkload.hpp
@@ -14,12 +14,12 @@
 
 arm_compute::Status ClConcatWorkloadValidate(const std::vector<const TensorInfo*>& inputs,
                                              const TensorInfo& output,
-                                             const MergerDescriptor& descriptor);
+                                             const OriginsDescriptor& descriptor);
 
-class ClConcatWorkload : public BaseWorkload<MergerQueueDescriptor>
+class ClConcatWorkload : public BaseWorkload<ConcatQueueDescriptor>
 {
 public:
-    ClConcatWorkload(const MergerQueueDescriptor& descriptor, const WorkloadInfo& info);
+    ClConcatWorkload(const ConcatQueueDescriptor& descriptor, const WorkloadInfo& info);
 
     void Execute() const override;
 
diff --git a/src/backends/neon/NeonLayerSupport.cpp b/src/backends/neon/NeonLayerSupport.cpp
index fd9aac5..e84eb79 100644
--- a/src/backends/neon/NeonLayerSupport.cpp
+++ b/src/backends/neon/NeonLayerSupport.cpp
@@ -146,12 +146,41 @@
 
 bool NeonLayerSupport::IsConcatSupported(const std::vector<const TensorInfo*> inputs,
                                          const TensorInfo& output,
-                                         const OriginsDescriptor& descriptor,
+                                         const ConcatDescriptor& descriptor,
                                          Optional<std::string&> reasonIfUnsupported) const
 {
-     ARMNN_NO_DEPRECATE_WARN_BEGIN
-     return IsMergerSupported(inputs, output, descriptor, reasonIfUnsupported);
-     ARMNN_NO_DEPRECATE_WARN_END
+    if (descriptor.GetNumDimensions() <= descriptor.GetConcatAxis())
+    {
+        SetValueChecked(reasonIfUnsupported, "Neon Concat: Concat axis > Number of dimensions.");
+        return false;
+    }
+
+    unsigned int concatInnerAxis = (descriptor.GetNumDimensions() - descriptor.GetConcatAxis()) - 1;
+    if(concatInnerAxis < 3) // Width, height, or channels
+    {
+        FORWARD_WORKLOAD_VALIDATE_FUNC(NeonConcatWorkloadValidate,
+                                       reasonIfUnsupported,
+                                       inputs,
+                                       output,
+                                       descriptor);
+    }
+    else if (concatInnerAxis == 3)
+    {
+        for (auto& input : inputs)
+        {
+            if (input && !output.IsTypeSpaceMatch(*input)) // Cannot use sub-tensors if the types are not same space
+            {
+                SetValueChecked(reasonIfUnsupported, "Neon Concat: Types and quantization parameters must match.");
+                return false;
+            }
+        }
+        return true; // Sub-tensors support concat along batch
+    }
+    else // > 4 dimensions not supported.
+    {
+        SetValueChecked(reasonIfUnsupported, "Neon Concat: Maximum of 4 dimensions supported.");
+        return false;
+    }
 }
 
 bool NeonLayerSupport::IsConstantSupported(const TensorInfo& output,
@@ -326,41 +355,10 @@
 
 bool NeonLayerSupport::IsMergerSupported(const std::vector<const TensorInfo*> inputs,
                                          const TensorInfo& output,
-                                         const OriginsDescriptor& descriptor,
+                                         const MergerDescriptor& descriptor,
                                          Optional<std::string&> reasonIfUnsupported) const
 {
-    if (descriptor.GetNumDimensions() <= descriptor.GetConcatAxis())
-    {
-        SetValueChecked(reasonIfUnsupported, "Neon Merger: Concat axis > Number of dimensions.");
-        return false;
-    }
-
-    unsigned int concatInnerAxis = (descriptor.GetNumDimensions() - descriptor.GetConcatAxis()) - 1;
-    if(concatInnerAxis < 3) // Width, height, or channels
-    {
-        FORWARD_WORKLOAD_VALIDATE_FUNC(NeonConcatWorkloadValidate,
-                                       reasonIfUnsupported,
-                                       inputs,
-                                       output,
-                                       descriptor);
-    }
-    else if (concatInnerAxis == 3)
-    {
-        for (auto& input : inputs)
-        {
-            if (input && !output.IsTypeSpaceMatch(*input)) // Cannot use sub-tensors if the types are not same space
-            {
-                SetValueChecked(reasonIfUnsupported, "Neon Merger: Types and quantization parameters must match.");
-                return false;
-            }
-        }
-        return true; // Sub-tensors support concat along batch
-    }
-    else // > 4 dimensions not supported.
-    {
-        SetValueChecked(reasonIfUnsupported, "Neon Merger: Maximum of 4 dimensions supported.");
-        return false;
-    }
+     return IsConcatSupported(inputs, output, descriptor, reasonIfUnsupported);
 }
 
 bool NeonLayerSupport::IsMinimumSupported(const TensorInfo& input0,
diff --git a/src/backends/neon/NeonLayerSupport.hpp b/src/backends/neon/NeonLayerSupport.hpp
index 5e8e0bd..dd6ed79 100644
--- a/src/backends/neon/NeonLayerSupport.hpp
+++ b/src/backends/neon/NeonLayerSupport.hpp
@@ -33,7 +33,7 @@
 
     bool IsConcatSupported(const std::vector<const TensorInfo*> inputs,
                            const TensorInfo& output,
-                           const OriginsDescriptor& descriptor,
+                           const ConcatDescriptor& descriptor,
                            Optional<std::string&> reasonIfUnsupported = EmptyOptional()) const override;
 
     bool IsConstantSupported(const TensorInfo& output,
@@ -109,7 +109,7 @@
     ARMNN_DEPRECATED_MSG("Use IsConcatSupported instead")
     bool IsMergerSupported(const std::vector<const TensorInfo*> inputs,
                            const TensorInfo& output,
-                           const OriginsDescriptor& descriptor,
+                           const MergerDescriptor& descriptor,
                            Optional<std::string&> reasonIfUnsupported = EmptyOptional()) const override;
 
     bool IsMinimumSupported(const TensorInfo& input0,
diff --git a/src/backends/neon/NeonWorkloadFactory.cpp b/src/backends/neon/NeonWorkloadFactory.cpp
index 3005dae..4b6225f 100644
--- a/src/backends/neon/NeonWorkloadFactory.cpp
+++ b/src/backends/neon/NeonWorkloadFactory.cpp
@@ -233,7 +233,7 @@
         m_MemoryManager->GetIntraLayerManager());
 }
 
-std::unique_ptr<armnn::IWorkload> NeonWorkloadFactory::CreateConcat(const MergerQueueDescriptor& descriptor,
+std::unique_ptr<armnn::IWorkload> NeonWorkloadFactory::CreateConcat(const ConcatQueueDescriptor& descriptor,
                                                                     const WorkloadInfo&          info) const
 {
     return std::make_unique<NeonConcatWorkload>(descriptor, info);
diff --git a/src/backends/neon/NeonWorkloadFactory.hpp b/src/backends/neon/NeonWorkloadFactory.hpp
index 60dbb90..6a28d12 100644
--- a/src/backends/neon/NeonWorkloadFactory.hpp
+++ b/src/backends/neon/NeonWorkloadFactory.hpp
@@ -98,7 +98,7 @@
     std::unique_ptr<IWorkload> CreateL2Normalization(const L2NormalizationQueueDescriptor& descriptor,
                                                      const WorkloadInfo& info) const override;
 
-    std::unique_ptr<IWorkload> CreateConcat(const MergerQueueDescriptor& descriptor,
+    std::unique_ptr<IWorkload> CreateConcat(const ConcatQueueDescriptor& descriptor,
                                             const WorkloadInfo& info) const override;
 
     std::unique_ptr<IWorkload> CreateConstant(const ConstantQueueDescriptor& descriptor,
diff --git a/src/backends/neon/test/NeonCreateWorkloadTests.cpp b/src/backends/neon/test/NeonCreateWorkloadTests.cpp
index b41d62f..8382365 100644
--- a/src/backends/neon/test/NeonCreateWorkloadTests.cpp
+++ b/src/backends/neon/test/NeonCreateWorkloadTests.cpp
@@ -504,30 +504,30 @@
     BOOST_TEST(TestNeonTensorHandleInfo(outputHandle2, TensorInfo({2, 7, 7}, DataType::Float32)));
 }
 
-BOOST_AUTO_TEST_CASE(CreateSplitterMerger)
+BOOST_AUTO_TEST_CASE(CreateSplitterConcat)
 {
     // Tests that it is possible to decide which output of the splitter layer
-    // should be lined to which input of the merger layer.
+    // should be lined to which input of the concat layer.
     // We tested that is is possible to specify 0th output
-    // of the splitter to be the 1st input to the merger, and the 1st output of the splitter to be 0th input
-    // of the merger.
+    // of the splitter to be the 1st input to the concat, and the 1st output of the splitter to be 0th input
+    // of the concat.
 
     Graph graph;
     NeonWorkloadFactory factory =
         NeonWorkloadFactoryHelper::GetFactory(NeonWorkloadFactoryHelper::GetMemoryManager());
 
     auto workloads =
-        CreateSplitterMergerWorkloadTest<NeonSplitterWorkload, NeonConcatWorkload,
+        CreateSplitterConcatWorkloadTest<NeonSplitterWorkload, NeonConcatWorkload,
             DataType::Float32>(factory, graph);
 
     auto wlSplitter = std::move(workloads.first);
-    auto wlMerger = std::move(workloads.second);
+    auto wlConcat = std::move(workloads.second);
 
     //Checks that the index of inputs/outputs matches what we declared on InputDescriptor construction.
     armnn::INeonTensorHandle* sOut0 = dynamic_cast<armnn::INeonTensorHandle*>(wlSplitter->GetData().m_Outputs[0]);
     armnn::INeonTensorHandle* sOut1 = dynamic_cast<armnn::INeonTensorHandle*>(wlSplitter->GetData().m_Outputs[1]);
-    armnn::INeonTensorHandle* mIn0 = dynamic_cast<armnn::INeonTensorHandle*>(wlMerger->GetData().m_Inputs[0]);
-    armnn::INeonTensorHandle* mIn1 = dynamic_cast<armnn::INeonTensorHandle*>(wlMerger->GetData().m_Inputs[1]);
+    armnn::INeonTensorHandle* mIn0 = dynamic_cast<armnn::INeonTensorHandle*>(wlConcat->GetData().m_Inputs[0]);
+    armnn::INeonTensorHandle* mIn1 = dynamic_cast<armnn::INeonTensorHandle*>(wlConcat->GetData().m_Inputs[1]);
 
     BOOST_TEST(sOut0);
     BOOST_TEST(sOut1);
@@ -632,17 +632,17 @@
     NeonCreateL2NormalizationWorkloadTest<NeonL2NormalizationFloatWorkload, DataType::Float32>(DataLayout::NHWC);
 }
 
-template <typename MergerWorkloadType, armnn::DataType DataType>
-static void NeonCreateMergerWorkloadTest(std::initializer_list<unsigned int> outputShape,
+template <typename ConcatWorkloadType, armnn::DataType DataType>
+static void NeonCreateConcatWorkloadTest(std::initializer_list<unsigned int> outputShape,
                                          unsigned int concatAxis)
 {
     Graph graph;
     NeonWorkloadFactory factory =
         NeonWorkloadFactoryHelper::GetFactory(NeonWorkloadFactoryHelper::GetMemoryManager());
 
-    auto workload = CreateMergerWorkloadTest<MergerWorkloadType, DataType>(factory, graph, outputShape, concatAxis);
+    auto workload = CreateConcatWorkloadTest<ConcatWorkloadType, DataType>(factory, graph, outputShape, concatAxis);
 
-    MergerQueueDescriptor queueDescriptor = workload->GetData();
+    ConcatQueueDescriptor queueDescriptor = workload->GetData();
     auto inputHandle0 = boost::polymorphic_downcast<INeonTensorHandle*>(queueDescriptor.m_Inputs[0]);
     auto inputHandle1 = boost::polymorphic_downcast<INeonTensorHandle*>(queueDescriptor.m_Inputs[1]);
     auto outputHandle = boost::polymorphic_downcast<INeonTensorHandle*>(queueDescriptor.m_Outputs[0]);
@@ -652,34 +652,34 @@
     BOOST_TEST(TestNeonTensorHandleInfo(outputHandle, TensorInfo(outputShape, DataType)));
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim0Float32Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim0Float32Workload)
 {
-    NeonCreateMergerWorkloadTest<NeonConcatWorkload, armnn::DataType::Float32>({ 4, 3, 2, 5 }, 0);
+    NeonCreateConcatWorkloadTest<NeonConcatWorkload, armnn::DataType::Float32>({ 4, 3, 2, 5 }, 0);
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim1Float32Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim1Float32Workload)
 {
-    NeonCreateMergerWorkloadTest<NeonConcatWorkload, armnn::DataType::Float32>({ 2, 6, 2, 5 }, 1);
+    NeonCreateConcatWorkloadTest<NeonConcatWorkload, armnn::DataType::Float32>({ 2, 6, 2, 5 }, 1);
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim3Float32Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim3Float32Workload)
 {
-    NeonCreateMergerWorkloadTest<NeonConcatWorkload, armnn::DataType::Float32>({ 2, 3, 2, 10 }, 3);
+    NeonCreateConcatWorkloadTest<NeonConcatWorkload, armnn::DataType::Float32>({ 2, 3, 2, 10 }, 3);
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim0Uint8Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim0Uint8Workload)
 {
-    NeonCreateMergerWorkloadTest<NeonConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 4, 3, 2, 5 }, 0);
+    NeonCreateConcatWorkloadTest<NeonConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 4, 3, 2, 5 }, 0);
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim1Uint8Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim1Uint8Workload)
 {
-    NeonCreateMergerWorkloadTest<NeonConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 2, 6, 2, 5 }, 1);
+    NeonCreateConcatWorkloadTest<NeonConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 2, 6, 2, 5 }, 1);
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim3Uint8Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim3Uint8Workload)
 {
-    NeonCreateMergerWorkloadTest<NeonConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 2, 3, 2, 10 }, 3);
+    NeonCreateConcatWorkloadTest<NeonConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 2, 3, 2, 10 }, 3);
 }
 
 BOOST_AUTO_TEST_SUITE_END()
diff --git a/src/backends/neon/test/NeonEndToEndTests.cpp b/src/backends/neon/test/NeonEndToEndTests.cpp
index 441efed..15f5fc3 100644
--- a/src/backends/neon/test/NeonEndToEndTests.cpp
+++ b/src/backends/neon/test/NeonEndToEndTests.cpp
@@ -4,7 +4,7 @@
 //
 
 #include <backendsCommon/test/EndToEndTestImpl.hpp>
-#include <backendsCommon/test/MergerTestImpl.hpp>
+#include <backendsCommon/test/ConcatTestImpl.hpp>
 #include <backendsCommon/test/ArithmeticTestImpl.hpp>
 #include <backendsCommon/test/SplitterEndToEndTestImpl.hpp>
 
@@ -93,34 +93,34 @@
                                                                                             expectedOutput);
 }
 
-BOOST_AUTO_TEST_CASE(NeonMergerEndToEndDim0Test)
+BOOST_AUTO_TEST_CASE(NeonConcatEndToEndDim0Test)
 {
-    MergerDim0EndToEnd<armnn::DataType::Float32>(defaultBackends);
+    ConcatDim0EndToEnd<armnn::DataType::Float32>(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(NeonMergerEndToEndDim0Uint8Test)
+BOOST_AUTO_TEST_CASE(NeonConcatEndToEndDim0Uint8Test)
 {
-    MergerDim0EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
+    ConcatDim0EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(NeonMergerEndToEndDim1Test)
+BOOST_AUTO_TEST_CASE(NeonConcatEndToEndDim1Test)
 {
-    MergerDim1EndToEnd<armnn::DataType::Float32>(defaultBackends);
+    ConcatDim1EndToEnd<armnn::DataType::Float32>(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(NeonMergerEndToEndDim1Uint8Test)
+BOOST_AUTO_TEST_CASE(NeonConcatEndToEndDim1Uint8Test)
 {
-    MergerDim1EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
+    ConcatDim1EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(NeonMergerEndToEndDim3Test)
+BOOST_AUTO_TEST_CASE(NeonConcatEndToEndDim3Test)
 {
-    MergerDim3EndToEnd<armnn::DataType::Float32>(defaultBackends);
+    ConcatDim3EndToEnd<armnn::DataType::Float32>(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(NeonMergerEndToEndDim3Uint8Test)
+BOOST_AUTO_TEST_CASE(NeonConcatEndToEndDim3Uint8Test)
 {
-    MergerDim3EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
+    ConcatDim3EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
 }
 
 BOOST_AUTO_TEST_CASE(NeonSplitDim0EndToEndTest)
diff --git a/src/backends/neon/workloads/NeonConcatWorkload.cpp b/src/backends/neon/workloads/NeonConcatWorkload.cpp
index 91f8109..8ea535b 100644
--- a/src/backends/neon/workloads/NeonConcatWorkload.cpp
+++ b/src/backends/neon/workloads/NeonConcatWorkload.cpp
@@ -19,7 +19,7 @@
 
 namespace
 {
-size_t CalcAxis(const armnn::MergerDescriptor& desc)
+size_t CalcAxis(const armnn::OriginsDescriptor& desc)
 {
     return (desc.GetNumDimensions() - desc.GetConcatAxis()) - 1;
 }
@@ -27,7 +27,7 @@
 
 arm_compute::Status NeonConcatWorkloadValidate(const std::vector<const TensorInfo*>& inputs,
                                                const TensorInfo& output,
-                                               const MergerDescriptor& descriptor)
+                                               const OriginsDescriptor& descriptor)
 
 {
     std::vector<arm_compute::TensorInfo> aclInputs;
@@ -48,8 +48,8 @@
 }
 
 NeonConcatWorkload::NeonConcatWorkload(
-const MergerQueueDescriptor& descriptor, const WorkloadInfo& info)
-        : BaseWorkload<MergerQueueDescriptor>(descriptor, info)
+const ConcatQueueDescriptor& descriptor, const WorkloadInfo& info)
+        : BaseWorkload<ConcatQueueDescriptor>(descriptor, info)
 {
     bool allInputsAreSubtensors = true;
 
@@ -58,7 +58,7 @@
     {
         if (!input->GetParent())
         {
-            // Non sub-tensor input found so we need to execute the merger function
+            // Non sub-tensor input found so we need to execute the concat function
             allInputsAreSubtensors = false;
             break;
         }
@@ -66,7 +66,7 @@
 
     if (allInputsAreSubtensors)
     {
-        // Can skip configuring the merger function since it's not executed
+        // Can skip configuring the concat function since it's not executed
         return;
     }
 
diff --git a/src/backends/neon/workloads/NeonConcatWorkload.hpp b/src/backends/neon/workloads/NeonConcatWorkload.hpp
index e5a8d15..bf0733b 100644
--- a/src/backends/neon/workloads/NeonConcatWorkload.hpp
+++ b/src/backends/neon/workloads/NeonConcatWorkload.hpp
@@ -17,14 +17,14 @@
 {
 arm_compute::Status NeonConcatWorkloadValidate(const std::vector<const TensorInfo*>& inputs,
                                                const TensorInfo& output,
-                                               const MergerDescriptor& descriptor);
+                                               const OriginsDescriptor& descriptor);
 
-class NeonConcatWorkload : public BaseWorkload<MergerQueueDescriptor>
+class NeonConcatWorkload : public BaseWorkload<ConcatQueueDescriptor>
 {
 public:
-    NeonConcatWorkload(const MergerQueueDescriptor& descriptor, const WorkloadInfo& info);
+    NeonConcatWorkload(const ConcatQueueDescriptor& descriptor, const WorkloadInfo& info);
 
-    using BaseWorkload<MergerQueueDescriptor>::BaseWorkload;
+    using BaseWorkload<ConcatQueueDescriptor>::BaseWorkload;
     void Execute() const override;
 
 private:
diff --git a/src/backends/reference/RefLayerSupport.cpp b/src/backends/reference/RefLayerSupport.cpp
index 2adcb10..9a691a6 100644
--- a/src/backends/reference/RefLayerSupport.cpp
+++ b/src/backends/reference/RefLayerSupport.cpp
@@ -316,18 +316,38 @@
 
 bool RefLayerSupport::IsConcatSupported(const std::vector<const TensorInfo*> inputs,
                                         const TensorInfo& output,
-                                        const OriginsDescriptor& descriptor,
+                                        const ConcatDescriptor& descriptor,
                                         Optional<std::string&> reasonIfUnsupported) const
 {
-    ARMNN_NO_DEPRECATE_WARN_BEGIN
-    return IsMergerSupported(inputs, output, descriptor, reasonIfUnsupported);
-    ARMNN_NO_DEPRECATE_WARN_END
+    ignore_unused(descriptor);
+
+    bool supported = true;
+    std::array<DataType,3> supportedTypes =
+    {
+            DataType::Float32,
+            DataType::QuantisedAsymm8,
+            DataType::QuantisedSymm16
+    };
+
+    supported &= CheckSupportRule(TypeAnyOf(output, supportedTypes), reasonIfUnsupported,
+                                  "Reference concatenation: output type not supported");
+    for (const TensorInfo* input : inputs)
+    {
+        supported &= CheckSupportRule(TypeAnyOf(*input, supportedTypes), reasonIfUnsupported,
+            "Reference concatenation: input type not supported");
+
+        supported &= CheckSupportRule(TypesAreEqual(*input, output), reasonIfUnsupported,
+            "Reference concatenation: input and output types mismatched.");
+    }
+
+    return supported;
 }
 
 bool RefLayerSupport::IsConstantSupported(const TensorInfo& output,
                                           Optional<std::string&> reasonIfUnsupported) const
 {
-    std::array<DataType,4> supportedTypes = {
+    std::array<DataType,4> supportedTypes =
+    {
         DataType::Float32,
         DataType::Signed32,
         DataType::QuantisedAsymm8,
@@ -815,31 +835,10 @@
 
 bool RefLayerSupport::IsMergerSupported(const std::vector<const TensorInfo*> inputs,
                                         const TensorInfo& output,
-                                        const OriginsDescriptor& descriptor,
+                                        const MergerDescriptor& descriptor,
                                         Optional<std::string&> reasonIfUnsupported) const
 {
-    ignore_unused(descriptor);
-
-    bool supported = true;
-    std::array<DataType,3> supportedTypes =
-    {
-            DataType::Float32,
-            DataType::QuantisedAsymm8,
-            DataType::QuantisedSymm16
-    };
-
-    supported &= CheckSupportRule(TypeAnyOf(output, supportedTypes), reasonIfUnsupported,
-                                  "Reference concatenation: output type not supported");
-    for (const TensorInfo* input : inputs)
-    {
-        supported &= CheckSupportRule(TypeAnyOf(*input, supportedTypes), reasonIfUnsupported,
-            "Reference concatenation: input type not supported");
-
-        supported &= CheckSupportRule(TypesAreEqual(*input, output), reasonIfUnsupported,
-            "Reference concatenation: input and output types mismatched.");
-    }
-
-    return supported;
+    return IsConcatSupported(inputs, output, descriptor, reasonIfUnsupported);
 }
 
 bool RefLayerSupport::IsMemCopySupported(const TensorInfo &input,
diff --git a/src/backends/reference/RefLayerSupport.hpp b/src/backends/reference/RefLayerSupport.hpp
index 944061d..8850c6e 100644
--- a/src/backends/reference/RefLayerSupport.hpp
+++ b/src/backends/reference/RefLayerSupport.hpp
@@ -38,7 +38,7 @@
 
     bool IsConcatSupported(const std::vector<const TensorInfo*> inputs,
                            const TensorInfo& output,
-                           const OriginsDescriptor& descriptor,
+                           const ConcatDescriptor& descriptor,
                            Optional<std::string&> reasonIfUnsupported = EmptyOptional()) const override;
 
     bool IsConstantSupported(const TensorInfo& output,
@@ -170,7 +170,7 @@
     ARMNN_DEPRECATED_MSG("Use IsConcatSupported instead")
     bool IsMergerSupported(const std::vector<const TensorInfo*> inputs,
                            const TensorInfo& output,
-                           const OriginsDescriptor& descriptor,
+                           const MergerDescriptor& descriptor,
                            Optional<std::string&> reasonIfUnsupported = EmptyOptional()) const override;
 
     bool IsMemCopySupported(const TensorInfo& input,
diff --git a/src/backends/reference/RefWorkloadFactory.cpp b/src/backends/reference/RefWorkloadFactory.cpp
index 1243328..a21becd 100644
--- a/src/backends/reference/RefWorkloadFactory.cpp
+++ b/src/backends/reference/RefWorkloadFactory.cpp
@@ -245,7 +245,7 @@
     return MakeWorkload<RefL2NormalizationFloat32Workload, NullWorkload>(descriptor, info);
 }
 
-std::unique_ptr<armnn::IWorkload> RefWorkloadFactory::CreateConcat(const MergerQueueDescriptor& descriptor,
+std::unique_ptr<armnn::IWorkload> RefWorkloadFactory::CreateConcat(const ConcatQueueDescriptor& descriptor,
                                                                    const WorkloadInfo&          info) const
 {
     if (IsFloat16(info))
diff --git a/src/backends/reference/RefWorkloadFactory.hpp b/src/backends/reference/RefWorkloadFactory.hpp
index 985b634..78f6bab 100644
--- a/src/backends/reference/RefWorkloadFactory.hpp
+++ b/src/backends/reference/RefWorkloadFactory.hpp
@@ -115,7 +115,7 @@
     std::unique_ptr<IWorkload> CreateL2Normalization(const L2NormalizationQueueDescriptor& descriptor,
                                                      const WorkloadInfo& info) const override;
 
-    std::unique_ptr<IWorkload> CreateConcat(const MergerQueueDescriptor& descriptor,
+    std::unique_ptr<IWorkload> CreateConcat(const ConcatQueueDescriptor& descriptor,
                                             const WorkloadInfo& info) const override;
 
     std::unique_ptr<IWorkload> CreateConstant(const ConstantQueueDescriptor& descriptor,
diff --git a/src/backends/reference/backend.mk b/src/backends/reference/backend.mk
index 1c7f8dc..9a4cf14 100644
--- a/src/backends/reference/backend.mk
+++ b/src/backends/reference/backend.mk
@@ -21,7 +21,7 @@
         workloads/FullyConnected.cpp \
         workloads/Gather.cpp \
         workloads/Mean.cpp \
-        workloads/Merger.cpp \
+        workloads/Concatenate.cpp \
         workloads/Pad.cpp \
         workloads/Pooling2d.cpp \
         workloads/RefActivationWorkload.cpp \
diff --git a/src/backends/reference/test/RefCreateWorkloadTests.cpp b/src/backends/reference/test/RefCreateWorkloadTests.cpp
index 3f4cc75..a96d656 100644
--- a/src/backends/reference/test/RefCreateWorkloadTests.cpp
+++ b/src/backends/reference/test/RefCreateWorkloadTests.cpp
@@ -473,28 +473,28 @@
     RefCreateSplitterWorkloadTest<RefSplitterUint8Workload, armnn::DataType::QuantisedAsymm8>();
 }
 
-template <typename SplitterWorkloadType, typename MergerWorkloadType, armnn::DataType DataType>
-static void RefCreateSplitterMergerWorkloadTest()
+template <typename SplitterWorkloadType, typename ConcatWorkloadType, armnn::DataType DataType>
+static void RefCreateSplitterConcatWorkloadTest()
 {
     // Tests that it is possible to decide which output of the splitter layer
-    // should be lined to which input of the merger layer.
+    // should be lined to which input of the concat layer.
     // We tested that is is possible to specify 0th output
-    // of the splitter to be the 1st input to the merger and the 1st output of the splitter to be 0th input
-    // of the merger.
+    // of the splitter to be the 1st input to the concat and the 1st output of the splitter to be 0th input
+    // of the concat.
 
     Graph graph;
     RefWorkloadFactory factory;
-    auto workloads = CreateSplitterMergerWorkloadTest<SplitterWorkloadType, MergerWorkloadType, DataType>
-        (factory, graph);
+    auto workloads = CreateSplitterConcatWorkloadTest<SplitterWorkloadType, ConcatWorkloadType, DataType>
+            (factory, graph);
 
     auto wlSplitter = std::move(workloads.first);
-    auto wlMerger = std::move(workloads.second);
+    auto wlConcat = std::move(workloads.second);
 
     //Checks that the index of inputs/outputs matches what we declared on InputDescriptor construction.
     armnn::CpuTensorHandle* sOut0 = dynamic_cast<armnn::CpuTensorHandle*>(wlSplitter->GetData().m_Outputs[0]);
     armnn::CpuTensorHandle* sOut1 = dynamic_cast<armnn::CpuTensorHandle*>(wlSplitter->GetData().m_Outputs[1]);
-    armnn::CpuTensorHandle* mIn0 = dynamic_cast<armnn::CpuTensorHandle*>(wlMerger->GetData().m_Inputs[0]);
-    armnn::CpuTensorHandle* mIn1 = dynamic_cast<armnn::CpuTensorHandle*>(wlMerger->GetData().m_Inputs[1]);
+    armnn::CpuTensorHandle* mIn0 = dynamic_cast<armnn::CpuTensorHandle*>(wlConcat->GetData().m_Inputs[0]);
+    armnn::CpuTensorHandle* mIn1 = dynamic_cast<armnn::CpuTensorHandle*>(wlConcat->GetData().m_Inputs[1]);
 
     BOOST_TEST(sOut0);
     BOOST_TEST(sOut1);
@@ -506,14 +506,14 @@
     BOOST_TEST(validDataPointers);
 }
 
-BOOST_AUTO_TEST_CASE(CreateSplitterMergerFloat32)
+BOOST_AUTO_TEST_CASE(CreateSplitterConcatFloat32)
 {
-    RefCreateSplitterMergerWorkloadTest<RefSplitterFloat32Workload, RefConcatWorkload, DataType::Float32>();
+    RefCreateSplitterConcatWorkloadTest<RefSplitterFloat32Workload, RefConcatWorkload, DataType::Float32>();
 }
 
-BOOST_AUTO_TEST_CASE(CreateSplitterMergerUint8)
+BOOST_AUTO_TEST_CASE(CreateSplitterConcatUint8)
 {
-    RefCreateSplitterMergerWorkloadTest<RefSplitterUint8Workload, RefConcatWorkload, DataType::QuantisedAsymm8>();
+    RefCreateSplitterConcatWorkloadTest<RefSplitterUint8Workload, RefConcatWorkload, DataType::QuantisedAsymm8>();
 }
 
 template <typename SplitterWorkloadType, typename ActivationWorkloadType, armnn::DataType DataType>
@@ -671,13 +671,13 @@
     RefCreateReshapeWorkloadTest<RefReshapeWorkload, armnn::DataType::QuantisedAsymm8>();
 }
 
-template <typename MergerWorkloadType, armnn::DataType DataType>
-static void RefCreateMergerWorkloadTest(const armnn::TensorShape& outputShape,
+template <typename ConcatWorkloadType, armnn::DataType DataType>
+static void RefCreateConcatWorkloadTest(const armnn::TensorShape& outputShape,
                                         unsigned int concatAxis)
 {
     Graph graph;
     RefWorkloadFactory factory;
-    auto workload = CreateMergerWorkloadTest<MergerWorkloadType, DataType>(factory, graph, outputShape, concatAxis);
+    auto workload = CreateConcatWorkloadTest<ConcatWorkloadType, DataType>(factory, graph, outputShape, concatAxis);
 
     CheckInputsOutput(std::move(workload),
                       TensorInfo({ 2, 3, 2, 5 }, DataType),
@@ -685,49 +685,49 @@
                       TensorInfo(outputShape, DataType));
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim0Float32Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim0Float32Workload)
 {
-    RefCreateMergerWorkloadTest<RefConcatWorkload, armnn::DataType::Float32>({ 4, 3, 2, 5 }, 0);
+    RefCreateConcatWorkloadTest<RefConcatWorkload, armnn::DataType::Float32>({ 4, 3, 2, 5 }, 0);
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim0Uint8Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim0Uint8Workload)
 {
-    RefCreateMergerWorkloadTest<RefConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 4, 3, 2, 5 }, 0);
+    RefCreateConcatWorkloadTest<RefConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 4, 3, 2, 5 }, 0);
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim0Uint16Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim0Uint16Workload)
 {
-    RefCreateMergerWorkloadTest<RefConcatWorkload, armnn::DataType::QuantisedSymm16>({ 4, 3, 2, 5 }, 0);
+    RefCreateConcatWorkloadTest<RefConcatWorkload, armnn::DataType::QuantisedSymm16>({ 4, 3, 2, 5 }, 0);
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim1Float32Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim1Float32Workload)
 {
-    RefCreateMergerWorkloadTest<RefConcatWorkload, armnn::DataType::Float32>({ 2, 6, 2, 5 }, 1);
+    RefCreateConcatWorkloadTest<RefConcatWorkload, armnn::DataType::Float32>({ 2, 6, 2, 5 }, 1);
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim1Uint8Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim1Uint8Workload)
 {
-    RefCreateMergerWorkloadTest<RefConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 2, 6, 2, 5 }, 1);
+    RefCreateConcatWorkloadTest<RefConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 2, 6, 2, 5 }, 1);
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim2Float32Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim2Float32Workload)
 {
-    RefCreateMergerWorkloadTest<RefConcatWorkload, armnn::DataType::Float32>({ 2, 3, 4, 5 }, 2);
+    RefCreateConcatWorkloadTest<RefConcatWorkload, armnn::DataType::Float32>({ 2, 3, 4, 5 }, 2);
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim2Uint8Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim2Uint8Workload)
 {
-    RefCreateMergerWorkloadTest<RefConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 2, 3, 4, 5 }, 2);
+    RefCreateConcatWorkloadTest<RefConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 2, 3, 4, 5 }, 2);
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim3Float32Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim3Float32Workload)
 {
-    RefCreateMergerWorkloadTest<RefConcatWorkload, armnn::DataType::Float32>({ 2, 3, 2, 10 }, 3);
+    RefCreateConcatWorkloadTest<RefConcatWorkload, armnn::DataType::Float32>({ 2, 3, 2, 10 }, 3);
 }
 
-BOOST_AUTO_TEST_CASE(CreateMergerDim3Uint8Workload)
+BOOST_AUTO_TEST_CASE(CreateConcatDim3Uint8Workload)
 {
-    RefCreateMergerWorkloadTest<RefConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 2, 3, 2, 10 }, 3);
+    RefCreateConcatWorkloadTest<RefConcatWorkload, armnn::DataType::QuantisedAsymm8>({ 2, 3, 2, 10 }, 3);
 }
 
 template <typename ConstantWorkloadType, armnn::DataType DataType>
diff --git a/src/backends/reference/test/RefEndToEndTests.cpp b/src/backends/reference/test/RefEndToEndTests.cpp
index 6dacfab..2b7fb77 100644
--- a/src/backends/reference/test/RefEndToEndTests.cpp
+++ b/src/backends/reference/test/RefEndToEndTests.cpp
@@ -7,7 +7,7 @@
 
 #include <backendsCommon/test/DetectionPostProcessTestImpl.hpp>
 #include <backendsCommon/test/GatherEndToEndTestImpl.hpp>
-#include <backendsCommon/test/MergerTestImpl.hpp>
+#include <backendsCommon/test/ConcatTestImpl.hpp>
 #include <backendsCommon/test/ArithmeticTestImpl.hpp>
 #include <backendsCommon/test/SplitterEndToEndTestImpl.hpp>
 
@@ -396,44 +396,44 @@
                                                                                             expectedOutput);
 }
 
-BOOST_AUTO_TEST_CASE(RefMergerEndToEndDim0Test)
+BOOST_AUTO_TEST_CASE(RefConcatEndToEndDim0Test)
 {
-    MergerDim0EndToEnd<armnn::DataType::Float32>(defaultBackends);
+    ConcatDim0EndToEnd<armnn::DataType::Float32>(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(RefMergerEndToEndDim0Uint8Test)
+BOOST_AUTO_TEST_CASE(RefConcatEndToEndDim0Uint8Test)
 {
-    MergerDim0EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
+    ConcatDim0EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(RefMergerEndToEndDim1Test)
+BOOST_AUTO_TEST_CASE(RefConcatEndToEndDim1Test)
 {
-    MergerDim1EndToEnd<armnn::DataType::Float32>(defaultBackends);
+    ConcatDim1EndToEnd<armnn::DataType::Float32>(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(RefMergerEndToEndDim1Uint8Test)
+BOOST_AUTO_TEST_CASE(RefConcatEndToEndDim1Uint8Test)
 {
-    MergerDim1EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
+    ConcatDim1EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(RefMergerEndToEndDim2Test)
+BOOST_AUTO_TEST_CASE(RefConcatEndToEndDim2Test)
 {
-    MergerDim2EndToEnd<armnn::DataType::Float32>(defaultBackends);
+    ConcatDim2EndToEnd<armnn::DataType::Float32>(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(RefMergerEndToEndDim2Uint8Test)
+BOOST_AUTO_TEST_CASE(RefConcatEndToEndDim2Uint8Test)
 {
-    MergerDim2EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
+    ConcatDim2EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(RefMergerEndToEndDim3Test)
+BOOST_AUTO_TEST_CASE(RefConcatEndToEndDim3Test)
 {
-    MergerDim3EndToEnd<armnn::DataType::Float32>(defaultBackends);
+    ConcatDim3EndToEnd<armnn::DataType::Float32>(defaultBackends);
 }
 
-BOOST_AUTO_TEST_CASE(RefMergerEndToEndDim3Uint8Test)
+BOOST_AUTO_TEST_CASE(RefConcatEndToEndDim3Uint8Test)
 {
-    MergerDim3EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
+    ConcatDim3EndToEnd<armnn::DataType::QuantisedAsymm8>(defaultBackends);
 }
 
 BOOST_AUTO_TEST_CASE(RefGatherFloatTest)
diff --git a/src/backends/reference/workloads/CMakeLists.txt b/src/backends/reference/workloads/CMakeLists.txt
index 508dfdc..3db0314 100644
--- a/src/backends/reference/workloads/CMakeLists.txt
+++ b/src/backends/reference/workloads/CMakeLists.txt
@@ -28,8 +28,8 @@
     Gather.hpp
     LstmUtils.hpp
     Maximum.hpp
-    Merger.hpp
-    Merger.cpp
+    Concatenate.hpp
+    Concatenate.cpp
     Minimum.hpp
     Pad.cpp
     Pad.hpp
diff --git a/src/backends/reference/workloads/Merger.cpp b/src/backends/reference/workloads/Concatenate.cpp
similarity index 94%
rename from src/backends/reference/workloads/Merger.cpp
rename to src/backends/reference/workloads/Concatenate.cpp
index e0b70ee..bb55424 100644
--- a/src/backends/reference/workloads/Merger.cpp
+++ b/src/backends/reference/workloads/Concatenate.cpp
@@ -3,7 +3,7 @@
 // SPDX-License-Identifier: MIT
 //
 
-#include "Merger.hpp"
+#include "Concatenate.hpp"
 #include "RefWorkloadUtils.hpp"
 #include "Decoders.hpp"
 #include "Encoders.hpp"
@@ -11,7 +11,7 @@
 namespace armnn
 {
 
-void Merger(const MergerQueueDescriptor& data)
+void Concatenate(const ConcatQueueDescriptor &data)
 {
     const TensorInfo& outputInfo0 = GetTensorInfo(data.m_Outputs[0]);
 
@@ -34,7 +34,7 @@
 
         for (unsigned int viewIdx = 0; viewIdx < data.m_ViewOrigins.size(); ++viewIdx)
         {
-            MergerQueueDescriptor::ViewOrigin const& view = data.m_ViewOrigins[viewIdx];
+            ConcatQueueDescriptor::ViewOrigin const& view = data.m_ViewOrigins[viewIdx];
 
             //Split view extents are defined by the size of (the corresponding) input tensor.
             const TensorInfo& inputInfo = GetTensorInfo(data.m_Inputs[viewIdx]);
diff --git a/src/backends/reference/workloads/Merger.hpp b/src/backends/reference/workloads/Concatenate.hpp
similarity index 80%
rename from src/backends/reference/workloads/Merger.hpp
rename to src/backends/reference/workloads/Concatenate.hpp
index eaa154d..ac82a87 100644
--- a/src/backends/reference/workloads/Merger.hpp
+++ b/src/backends/reference/workloads/Concatenate.hpp
@@ -10,5 +10,5 @@
 
 namespace armnn
 {
-void Merger(const MergerQueueDescriptor& data);
+void Concatenate(const ConcatQueueDescriptor &data);
 } //namespace armnn
diff --git a/src/backends/reference/workloads/RefConcatWorkload.cpp b/src/backends/reference/workloads/RefConcatWorkload.cpp
index 9abddc0..152eae9 100644
--- a/src/backends/reference/workloads/RefConcatWorkload.cpp
+++ b/src/backends/reference/workloads/RefConcatWorkload.cpp
@@ -5,7 +5,7 @@
 
 #include "RefConcatWorkload.hpp"
 
-#include "Merger.hpp"
+#include "Concatenate.hpp"
 
 #include "Profiling.hpp"
 
@@ -15,7 +15,7 @@
 void RefConcatWorkload::Execute() const
 {
     ARMNN_SCOPED_PROFILING_EVENT(Compute::CpuRef, "RefConcatWorkload_Execute");
-    Merger(m_Data);
+    Concatenate(m_Data);
 }
 
 } //namespace armnn
diff --git a/src/backends/reference/workloads/RefConcatWorkload.hpp b/src/backends/reference/workloads/RefConcatWorkload.hpp
index 9fc9c7e..7d0b6b7 100644
--- a/src/backends/reference/workloads/RefConcatWorkload.hpp
+++ b/src/backends/reference/workloads/RefConcatWorkload.hpp
@@ -11,10 +11,10 @@
 namespace armnn
 {
 
-class RefConcatWorkload : public BaseWorkload<MergerQueueDescriptor>
+class RefConcatWorkload : public BaseWorkload<ConcatQueueDescriptor>
 {
 public:
-    using BaseWorkload<MergerQueueDescriptor>::BaseWorkload;
+    using BaseWorkload<ConcatQueueDescriptor>::BaseWorkload;
     virtual void Execute() const override;
 };
 
diff --git a/src/backends/reference/workloads/RefWorkloads.hpp b/src/backends/reference/workloads/RefWorkloads.hpp
index 20649d9..6ffec2b 100644
--- a/src/backends/reference/workloads/RefWorkloads.hpp
+++ b/src/backends/reference/workloads/RefWorkloads.hpp
@@ -38,7 +38,7 @@
 #include "RefPooling2dUint8Workload.hpp"
 #include "BatchNormImpl.hpp"
 #include "Activation.hpp"
-#include "Merger.hpp"
+#include "Concatenate.hpp"
 #include "RefSpaceToBatchNdWorkload.hpp"
 #include "RefSplitterFloat32Workload.hpp"
 #include "RefStridedSliceWorkload.hpp"