diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index 1ce447fb..00000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,367 +0,0 @@
-version: 2.1
-
-orbs:
-  slack: circleci/slack@3.4.2
-  aws-cli: circleci/aws-cli@4.0.0
-  aws-ecr: circleci/aws-ecr@8.2.1 # this orb doesn't support OIDC v2, so we use aws-cli to authenticate
-
-executors:
-  machine_executor:
-    machine:
-      image: default
-
-references:
-  defaults: &defaults
-    working_directory: ~/contact-moj
-
-# Sets up the docker images and environment variables that we use
-  test_container_config: &test_container_config
-    docker:
-      - image: cimg/ruby:3.2.3-browsers
-        environment:
-          RAILS_ENV: test
-          RACK_ENV: test
-          PG_HOST: 127.0.0.1
-          PG_PASSWORD: ""
-          PG_USER: postgres
-          PGUSER: postgres
-          PGHOST: 127.0.0.1
-          POSTGRES_DB: correspondence_tool_public_test
-
-      - image: cimg/postgres:12.15
-        environment:
-          PG_PASSWORD: ""
-          PG_USER: postgres
-          POSTGRES_DB: correspondence_tool_public_test
-          POSTGRES_USER: postgres
-          PGUSER: postgres
-
-  deploy_container_config: &deploy_container_config
-    docker:
-      - image: ministryofjustice/cloud-platform-tools:1.29
-
-# These are defining the steps which are used below in the jobs
-  install_psql: &install_psql
-    run:
-      name: Install psql client
-      command: |
-         sudo apt update && sudo apt install postgresql-client
-
-  install_expect: &install_expect
-    run:
-      name: Install Expect
-      command: |
-        apk add \
-          --no-cache \
-          --no-progress \
-          expect
-
-  install_bundler: &install_bundler
-    run:
-      name: Install bundler
-      command: |
-        gem install bundler -v 2.4.19
-
-  check_bundler_version: &check_bundler_version
-    run:
-      name: Check the installed version of bundler
-      command: |
-        bundle -v
-
-  restore_cache: &restore_cache
-    restore_cache:
-      keys:
-        - correspondence-tool-public-{{ checksum "Gemfile.lock" }}
-        # fallback to using the latest cache if no exact match is found
-        - correspondence-tool-public-
-
-  install_dependencies: &install_dependencies
-    run:
-      name: Install dependencies
-      command: |
-        sudo apt-get update
-        sudo apt-get install bc
-        if [ "${CIRCLE_NODE_INDEX}" == "0" ]; then
-          bundle config deployment true
-          bundle check || bundle install && bundle clean
-          yarn install --pure-lockfile
-        fi
-
-  save_cache: &save_cache
-    save_cache:
-      key: correspondence-tool-public-{{ checksum "Gemfile.lock" }}
-      paths:
-        - vendor/bundle
-
-  wait_for_db: &wait_for_db
-    run:
-      name: Wait for DB
-      command: dockerize -wait tcp://localhost:5432 -timeout 1m
-
-  set_up_the_database: &set_up_the_database
-    run:
-      name: Set up the database
-      command: |
-        bundle exec rake db:setup
-
-  rubocop: &rubocop
-    run:
-      name: Run rubocop
-      command: bundle exec rubocop
-
-  brakeman: &brakeman
-    run:
-      name: Run brakeman
-      command: bundle exec brakeman
-
-  run_unit_and_feature_tests: &run_unit_and_feature_tests
-    run:
-      name: Run unit and feature tests
-      command: |
-        bundle exec rspec
-
-  store_coverage: &store_coverage
-    store_artifacts:
-      path: coverage
-
-  check_coverage: &check_coverage
-    run:
-      name: Check test coverage
-      command: |
-        limit=95 # Coverage percentage below this number will cause the build to fail
-        coverage=$(grep -o '"line":.*' coverage/.last_run.json | cut -d" " -f2-)
-        echo "Details of test coverage is available from the Artifacts tab"
-        echo "Tests cover $coverage% of code"
-        if (( $(echo "$coverage < $limit" | bc -l) )); then
-          echo "This is under the target of $limit%"
-          exit 1
-        fi
-
-  aws_setup: &aws_setup
-    # Authenticate to AWS using OIDC v2 with the AWS CLI
-    aws-cli/setup:
-      role_arn: $ECR_ROLE_TO_ASSUME
-      region: $ECR_REGION
-
-  ecr_login: &ecr_login
-    run:
-      name: Authenticate to the ECR repository
-      command: |
-        aws ecr get-login-password --region $ECR_REGION | docker login --username AWS --password-stdin ${AWS_ECR_REGISTRY_ID}.dkr.ecr.${ECR_REGION}.amazonaws.com
-
-  configure_build_tag: &configure_build_tag
-    run:
-      name: Create build tag
-      command: |
-        prefix="cmoj"
-        short_version=$(git rev-parse --short $CIRCLE_BRANCH)
-        branch=$(echo $CIRCLE_BRANCH | sed -r 's/[\/]+/-/g') # replace / with -
-        build_tag=$prefix-$branch-$short_version
-
-        echo "export BUILD_TAG=$build_tag" >> $BASH_ENV
-        source $BASH_ENV
-
-        mkdir -p workspace
-        echo $BUILD_TAG > workspace/build_tag
-
-  build_and_push_image: &build_and_push_image
-    aws-ecr/build-image:
-      push-image: true
-      tag: $BUILD_TAG
-      region: $ECR_REGION
-      repo: $ECR_REPOSITORY
-      extra-build-args: |
-        --build-arg BUILD_DATE=$(date +%Y-%m-%dT%H:%M:%S%z) \
-        --build-arg COMMIT_ID=$CIRCLE_SHA1 \
-        --build-arg BUILD_TAG=$BUILD_TAG \
-
-  deploy_to_dev: &deploy_to_dev
-    run:
-      name: Deploy to Development environment
-      command: |
-        build_tag=`cat /tmp/workspace/build_tag`
-        ./deploy.sh $build_tag development circleci
-        echo "export BUILD_TAG=${build_tag}" >> $BASH_ENV
-        source $BASH_ENV
-
-  deploy_to_staging: &deploy_to_staging
-    run:
-      name: Deploy to Staging environment
-      command: |
-        build_tag=`cat /tmp/workspace/build_tag`
-        ./deploy.sh $build_tag staging circleci
-        echo "export BUILD_TAG=${build_tag}" >> $BASH_ENV
-        source $BASH_ENV
-
-  deploy_to_production: &deploy_to_production
-    run:
-      name: Deploy to production environment
-      command: |
-        build_tag=`cat /tmp/workspace/build_tag`
-        ./deploy.sh $build_tag production circleci
-        echo "export BUILD_TAG=${build_tag}" >> $BASH_ENV
-        source $BASH_ENV
-
-jobs:
-
-  build_and_test:
-    <<: *test_container_config
-    <<: *defaults
-    steps:
-      - checkout
-      - *restore_cache
-      - *install_bundler
-      - *check_bundler_version
-      - *install_psql
-      - *install_dependencies
-      - *save_cache
-      - *wait_for_db
-      - *set_up_the_database
-      - *rubocop
-      - *brakeman
-      - *run_unit_and_feature_tests
-      - *store_coverage
-      - *check_coverage
-
-  build_branch_and_push_to_ecr:
-    executor: machine_executor
-    <<: *defaults
-    steps:
-      - checkout
-      - attach_workspace:
-          at: /tmp/workspace
-      - *aws_setup
-      - *ecr_login
-      - *configure_build_tag
-      - *build_and_push_image
-      - persist_to_workspace:
-          root: workspace
-          paths:
-            - build_tag
-
-  build_main_and_push_to_ecr:
-    executor: machine_executor
-    <<: *defaults
-    steps:
-      - checkout
-      - attach_workspace:
-          at: /tmp/workspace
-      - *aws_setup
-      - *ecr_login
-      - *configure_build_tag
-      - *build_and_push_image
-      - persist_to_workspace:
-          root: workspace
-          paths:
-            - build_tag
-
-  dev_deployment_tasks: &do_dev_deployment_tasks
-    <<: *deploy_container_config
-    <<: *defaults
-    steps:
-      - checkout
-      - attach_workspace:
-          at: /tmp/workspace
-      - *install_expect
-      - *deploy_to_dev
-      - slack/notify:
-          color: '#1d990c'
-          message: '${CIRCLE_USERNAME} deployed *${BUILD_TAG}* to *Development*'
-          webhook: ${SLACK_WEBHOOK}
-
-  deploy_branch_to_dev: *do_dev_deployment_tasks
-  deploy_main_to_dev: *do_dev_deployment_tasks
-
-  staging_deployment_tasks: &do_staging_deployment_tasks
-    <<: *deploy_container_config
-    <<: *defaults
-    steps:
-      - checkout
-      - attach_workspace:
-          at: /tmp/workspace
-      - *install_expect
-      - *deploy_to_staging
-      - slack/notify:
-          color: '#1d990c'
-          message: '${CIRCLE_USERNAME} deployed *${BUILD_TAG}* to *Staging*'
-          webhook: ${SLACK_WEBHOOK}
-
-  deploy_branch_to_staging: *do_staging_deployment_tasks
-  deploy_main_to_staging: *do_staging_deployment_tasks
-
-  deploy_main_to_production:
-    <<: *deploy_container_config
-    <<: *defaults
-    steps:
-      - checkout
-      - attach_workspace:
-          at: /tmp/workspace
-      - *install_expect
-      - *deploy_to_production
-      - slack/notify:
-          color: '#1d990c'
-          mentions: 'staff-tools-team'
-          message: '${CIRCLE_USERNAME} deployed *${BUILD_TAG}* to *Production*'
-          webhook: ${SLACK_WEBHOOK_SS_CIRCLECI}
-      - slack/notify:
-          color: '#1d990c'
-          message: '${CIRCLE_USERNAME} deployed *${BUILD_TAG}* to *Production*'
-          webhook: ${SLACK_WEBHOOK}
-
-workflows:
-  version: 2
-
-  build_and_deploy_main:
-    jobs:
-      - build_and_test:
-          filters:
-            branches:
-              only: main
-      - build_main_and_push_to_ecr:
-          requires:
-            - build_and_test
-      - deploy_main_to_dev:
-          requires:
-            - build_main_and_push_to_ecr
-      - deploy_main_to_staging_approval:
-          type: approval
-          requires:
-            - deploy_main_to_dev
-      - deploy_main_to_staging:
-          requires:
-            - deploy_main_to_staging_approval
-      - deploy_main_to_production_approval:
-          type: approval
-          requires:
-            - deploy_main_to_staging
-      - deploy_main_to_production:
-          requires:
-            - deploy_main_to_production_approval
-
-  build_and_deploy_branch:
-    jobs:
-      - build_and_test:
-          filters:
-            branches:
-              ignore: main
-      - build_branch_and_push_to_ecr_approval:
-          type: approval
-          requires:
-            - build_and_test
-      - build_branch_and_push_to_ecr:
-          requires:
-            - build_branch_and_push_to_ecr_approval
-      - deploy_branch_to_dev_approval:
-          type: approval
-          requires:
-            - build_branch_and_push_to_ecr
-      - deploy_branch_to_dev:
-          requires:
-            - deploy_branch_to_dev_approval
-      - deploy_branch_to_staging_approval:
-          type: approval
-          requires:
-            - build_branch_and_push_to_ecr
-      - deploy_branch_to_staging:
-          requires:
-            - deploy_branch_to_staging_approval