diff --git a/.github/actions/do_build_dpcpp/action.yml b/.github/actions/do_build_dpcpp/action.yml
new file mode 100644
index 000000000..65092c551
--- /dev/null
+++ b/.github/actions/do_build_dpcpp/action.yml
@@ -0,0 +1,87 @@
+name: build dpc++
+description: build dpc++
+
+inputs:
+  target:
+    description: 'target architecture'
+
+runs:
+  using: "composite"
+  steps:
+    - name: calc vars
+      id: calc_vars
+      uses: ./.github/actions/calc_vars
+      with:
+        target: ${{ inputs.target }}  
+
+    - name: Install Ninja
+      uses: llvm/actions/install-ninja@main
+
+    - name: Install spirv tools
+      shell: bash
+      run:    
+        sudo apt-get install spirv-tools
+    
+    - name: clone dpc++
+      uses: actions/checkout@v4
+      with:
+        repository: intel/llvm
+        path: llvm
+
+    - name: dpcpp configure
+      shell: bash
+      run:
+        cd llvm; python buildbot/configure.py
+        -o build
+        --host-target="X86;AArch64;RISCV"
+        --native_cpu
+        --llvm-external-projects=lld
+        --cmake-opt=-DNATIVECPU_USE_OCK=ON
+        --cmake-opt=-DLLVM_ENABLE_ZLIB=OFF
+        --cmake-opt=-DLLVM_ENABLE_ZSTD=OFF
+    - name: build sycl-headers
+      shell: bash
+      run:
+        cmake --build llvm/build -- sycl-headers
+  
+    - name: build dpc plus plus
+      shell: bash
+      run:
+       python llvm/buildbot/compile.py -o llvm/build -v -j 8
+
+    - name: build extra utilties
+      # Build various utilities, since those aren't proper dependencies.
+      # FileCheck and not are needed for tests. The rest are needed for
+      # cross builds. They are enabled on all targets for consistency.
+      shell: bash
+      run:
+       cmake --build llvm/build -- FileCheck clang-tblgen
+        libclc-remangler llvm-as llvm-min-tblgen llvm-tblgen not
+        opt prepare_builtins -j8
+    - name: copy utilities
+      shell: bash
+      run:
+        cd llvm/build/bin;
+        cp FileCheck clang-tblgen libclc-remangler llvm-as llvm-min-tblgen
+        llvm-tblgen not opt prepare_builtins ../install/bin
+
+    - name: install config files to pick up libraries for cross compilation.
+      shell: bash
+      run: |
+        echo Installing configuration files
+        cd llvm/build/bin
+        # Install configuration files to pick up libraries for cross compilation.
+        for arch in x86_64 aarch64 riscv64; do
+          echo "
+          -L<CFGDIR>/../../../$arch-linux/install/lib
+          -fsycl-libdevice-path=<CFGDIR>/../../../$arch-linux/install/lib
+          -fsycl-libspirv-path=<CFGDIR>/../../../$arch-linux/install/lib/clc/remangled-l64-signed_char.libspirv-$arch-unknown-linux-gnu.bc
+          " >../install/bin/$arch-unknown-linux-gnu.cfg;
+        done
+
+    - name: upload dpcpp artifact
+      uses: actions/upload-artifact@v4
+      with:
+        name: dpcpp_${{inputs.target}}
+        path: llvm/build/install
+        retention-days: 1
diff --git a/.github/actions/do_build_sycl_cts/action.yml b/.github/actions/do_build_sycl_cts/action.yml
new file mode 100644
index 000000000..9af23461e
--- /dev/null
+++ b/.github/actions/do_build_sycl_cts/action.yml
@@ -0,0 +1,71 @@
+name: build sycl cts
+description: build sycl cts
+
+inputs:
+  target:
+    description: 'target architecture'
+
+runs:
+  using: "composite"
+  steps:
+    - name: calc vars
+      id: calc_vars
+      uses: ./.github/actions/calc_vars
+      with:
+        target: ${{ inputs.target }}  
+
+    - name: Install Ninja
+      uses: llvm/actions/install-ninja@main
+
+    - name: download icd artifact
+      uses: actions/download-artifact@v4
+      with:
+        name: icd_${{inputs.target}}
+        path: install_icd
+
+    - name: download headers artifact
+      uses: actions/download-artifact@v4
+      with:
+        name: headers_${{inputs.target}}
+        path: install_headers
+
+    - name: download dpc++ artifact
+      uses: actions/download-artifact@v4
+      with:
+        name: dpcpp_${{inputs.target}}
+        path: install_dpcpp
+
+    - name: checkout sycl cts
+      uses: actions/checkout@v4
+      with:
+        repository: KhronosGroup/SYCL-CTS
+        path: SYCL-CTS.src
+
+    -name: build SYCL CTS
+     shell: bash
+     run: |
+       # Todo: as we extend into cross etc, we may want to expand on the cxx flags
+       # We build SYCL-CTS without installing it, so build directly in the top level.
+       cd SYCL-CTS.src
+       git -C SYCL-CTS.src log -1
+       # git -C SYCL-CTS.src apply $CI_PROJECT_DIR/patches/SYCL-CTS-0002-Permit-building-for-unknown-architectures.patch
+       cd ..
+       cmake -S SYCL-CTS.src \
+            -GNinja \
+            -B SYCL-CTS \
+            -DSYCL_IMPLEMENTATION=DPCPP \
+            -DDPCPP_INSTALL_DIR=$GITHUB_WORKSPACE/install_dpcpp \
+            -DOpenCL_LIBRARY=$GITHUB_WORKSPACE/install_icd/lib/libOpenCL.so \
+            -DOpenCL_INCLUDE_DIR=$GITHUB_WORKSPACE/install_headers/include \
+            -DCMAKE_CXX_COMPILER="$GITHUB_WORKSPACE/install_dpcpp/bin/clang++" \
+            -DCMAKE_CXX_FLAGS="--target=${{steps.calc_vars.outputs.arch}}-linux-gnu" \
+            -DCMAKE_CXX_LINK_FLAGS="-fuse-ld=lld"
+        ninja -C SYCL-CTS -v -j8 -k 0 || :        
+
+    - name: upload artefact
+      uses: actions/upload-artifact@v4
+      with:
+        name: sycl_cts_${{inputs.target}}
+        path: SYCL-CTS/bin/**
+        retention-days: 1
+  
\ No newline at end of file
diff --git a/.github/actions/run_sycl_cts/action.yml b/.github/actions/run_sycl_cts/action.yml
new file mode 100644
index 000000000..68461aefb
--- /dev/null
+++ b/.github/actions/run_sycl_cts/action.yml
@@ -0,0 +1,63 @@
+name: run sycl cts
+description: run sycl cts
+
+inputs:
+  target:
+    description: 'target architecture'
+
+runs:
+  using: "composite"
+  steps:
+    - name: calc vars
+      id: calc_vars
+      uses: ./.github/actions/calc_vars
+      with:
+        target: ${{ inputs.target }}  
+
+    - name: Install Ninja
+      uses: llvm/actions/install-ninja@main
+
+    - name: download ock artifact
+      uses: actions/download-artifact@v4
+      with:
+        name: ock_${{inputs.target}}
+        path: install_ock
+
+    - name: download headers artifact
+      uses: actions/download-artifact@v4
+      with:
+        name: headers_${{inputs.target}}
+        path: install_headers
+
+    - name: download dpc++ artifact
+      uses: actions/download-artifact@v4
+      with:
+        name: dpcpp_${{inputs.target}}
+        path: install_dpcpp
+
+    - name: run sycl cts
+      shell: bash
+      run: |
+        # TODO: have qemu as input and set up this
+        export PREPEND_PATH=
+        echo running sycl cts
+        export LD_LIBRARY_PATH=$GITHUB_WORKSPACE/install_dpcpp/lib:$GITHUB_WORKSPACE/install_ock/lib
+        export ONEAPI_DEVICE_SELECTOR=opencl:0
+        python $GITHUB_WORKSPACE/scripts/testing/run_cities.py \
+        --color=always \
+        --timeout $SYCL_CTS_TIMEOUT \
+        $PREPEND_PATH \
+        -p sycl_cts \
+        -b SYCL-CTS/bin \
+        -L SYCL-CTS/lib \
+        -e OCL_ICD_FILENAMES=$GITHUB_WORKSPACE/install_ock/lib/libCL.so \
+        -s "$GITHUB_WORKSPACE/.github/scripts/sycl-cts.csv" \
+        -l SYCL-CTS/cts.log -f SYCL-CTS/cts.fail \
+        -r SYCL-CTS/cts.xml \
+        -v \
+        $SYCL_CTS_FILTER || exitcode=$?
+        export OCL_ICD_FILENAMES=$CA_INSTALL_DIR/lib/libCL.so
+       #$GITHUB_WORKSPACE/scripts/create_sycl_cts_test_lists.sh $[[ inputs.prepend_path ]] SYCL-CTS "$CTS_CSV_FILE" csv.txt cts_all.txt
+       # output a diff of the generated list csv.txt and cts_all.txt
+       # - diff csv.txt cts_all.txt || echo "WARNING - Missing some tests from sycl cts file based on test_all --list-tests - see > above"
+       exit $exitcode
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 969248aa1..628fb14ac 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -4,20 +4,20 @@ on:
   push:
     branches:
       - main
-  pull_request:
-    branches:
-      - main
-    paths:
-      - 'source/**'
-      - 'clik/**'
-      - 'modules/**'
-      - 'examples/**'
-      - 'cmake/**'
-      - 'hal/**'
-      - '.github/actions/do_build_ock/**'
-      - '.github/actions/setup_build/**'
-      - '.github/workflows/codeql.yml'
-      - 'CMakeLists.txt'
+  # pull_request:
+  #   branches:
+  #     - main
+  #   paths:
+  #     - 'source/**'
+  #     - 'clik/**'
+  #     - 'modules/**'
+  #     - 'examples/**'
+  #     - 'cmake/**'
+  #     - 'hal/**'
+  #     - '.github/actions/do_build_ock/**'
+  #     - '.github/actions/setup_build/**'
+  #     - '.github/workflows/codeql.yml'
+  #     - 'CMakeLists.txt'
   schedule:
     - cron: '19 9 * * 3'
 
diff --git a/.github/workflows/planned_testing.yml b/.github/workflows/planned_testing.yml
index 2d456e44e..f7521edb1 100644
--- a/.github/workflows/planned_testing.yml
+++ b/.github/workflows/planned_testing.yml
@@ -10,7 +10,11 @@ on:
       test_tornado:
         required: false
         type: boolean
-        default: true        
+        default: true
+      test_sycl_cts:
+        required: false
+        type: boolean
+        default: true
       target_list:
         required: false
         type: string
@@ -66,7 +70,7 @@ jobs:
 
   build_icd:
     # Will also be required for opencl
-    if: inputs.test_tornado
+    if: inputs.test_tornado || inputs.test_sycl_cts
     needs: [workflow_vars]
     strategy:
       matrix:
@@ -114,3 +118,57 @@ jobs:
         uses: ./.github/actions/run_tornado
         with:
           target: ${{ matrix.target }}
+
+  build_dpcpp_native_host:
+    needs: [workflow_vars]
+    strategy:
+      matrix:
+        target: ${{ fromJson(inputs.target_list) }}
+        exclude: ${{ fromJson(needs.workflow_vars.outputs.matrix_only_linux_x86_64) }}
+
+    runs-on: ${{ contains(matrix.target, 'windows') && 'windows-2019' || 'ubuntu-22.04'  }}
+    if : inputs.test_sycl_cts
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+      - name: build dpc++ artefact
+        uses: ./.github/actions/do_build_dpcpp
+        with:
+          target: ${{ matrix.target }}
+          llvm_version: ${{ inputs.llvm_version }}
+
+  build_sycl_cts:
+    needs: [workflow_vars, build_icd, build_dpcpp_native_host]
+    strategy:
+      matrix:
+        target: ${{ fromJson(inputs.target_list) }}
+        # For now just linux x86_64
+        exclude: ${{ fromJson(needs.workflow_vars.outputs.matrix_only_linux_x86_64) }}
+
+    runs-on: 'ubuntu-22.04'
+    if : inputs.test_sycl_cts
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+      - name: build dpc++ artefact
+        uses: ./.github/actions/do_build_sycl_cts
+        with:
+          target: ${{ matrix.target }}
+
+  run_sycl_cts:
+    needs: [workflow_vars, build_ock, build_dpcpp_native_host, build_sycl_cts_native_host]
+    strategy:
+      matrix:
+        target: ${{ fromJson(inputs.target_list) }}
+        # For now just linux x86_64
+        exclude: ${{ fromJson(needs.workflow_vars.outputs.matrix_only_linux_x86_64) }}
+
+    runs-on: 'ubuntu-22.04'
+    if : inputs.test_sycl_cts
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+      - name: build dpc++ artefact
+        uses: ./.github/actions/run_sycl_cts
+        with:
+          target: ${{ matrix.target }}
diff --git a/.github/workflows/planned_testing_caller.yml b/.github/workflows/planned_testing_caller.yml
index 23e81af15..13a9ddfd1 100644
--- a/.github/workflows/planned_testing_caller.yml
+++ b/.github/workflows/planned_testing_caller.yml
@@ -18,8 +18,12 @@ jobs:
     if: github.repository == 'uxlfoundation/oneapi-construction-kit' || github.event_name != 'schedule'
     uses: ./.github/workflows/planned_testing.yml
     with:
-      target_list: '["host_x86_64_linux", "host_aarch64_linux", "host_riscv64_linux", "host_i686_linux", "host_refsi_linux", "host_x86_64_windows" ]'
-      test_tornado: true
+#      target_list: '["host_x86_64_linux", "host_aarch64_linux", "host_riscv64_linux", "host_i686_linux", "host_refsi_linux", "host_x86_64_windows" ]'
+      target_list: '["host_x86_64_linux"]'
+      ock: true
+      test_tornado: false
+      test_sycl_cts: true
+      # true
       # Have a pull request setting which can be used to test the flow as best as possible
       # in a reasonable time
       pull_request: ${{ github.event_name == 'pull_request' }}
diff --git a/.github/workflows/run_pr_tests_caller.yml b/.github/workflows/run_pr_tests_caller.yml
index 58e8e76c3..d8010300c 100644
--- a/.github/workflows/run_pr_tests_caller.yml
+++ b/.github/workflows/run_pr_tests_caller.yml
@@ -25,7 +25,8 @@ concurrency:
 jobs:
   run-with-pull:
     name: Call PR testing on pull request
-    if: ${{ github.event_name == 'pull_request' }}    
+    if: false
+    # ${{ github.event_name == 'pull_request' }}    
     uses: ./.github/workflows/run_pr_tests.yml
     with:
       update_cache: false