diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index ef20b6cb4..501a6835b 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -3,8 +3,6 @@ class ApplicationController < ActionController::Base
   # For APIs, you may want to use :null_session instead.
   protect_from_forgery except: :service_sign_in_options
 
-  include ABTestable
-
 private
 
   def content_item_path
diff --git a/app/controllers/concerns/ab_testable.rb b/app/controllers/concerns/ab_testable.rb
deleted file mode 100644
index f91753667..000000000
--- a/app/controllers/concerns/ab_testable.rb
+++ /dev/null
@@ -1,29 +0,0 @@
-module ABTestable
-  RELATED_LINKS_DIMENSION = 65
-
-  def self.included(base)
-    base.helper_method(
-      :related_links_variant
-    )
-    base.after_action :set_test_response_header
-  end
-
-  def related_links_variant
-    @related_links_variant ||= related_links_test.requested_variant(request.headers)
-  end
-
-private
-
-  def related_links_test
-    @related_links_test ||= GovukAbTesting::AbTest.new(
-      "RelatedLinksABTest4",
-      dimension: RELATED_LINKS_DIMENSION,
-      allowed_variants: %w(A B C),
-      control_variant: "A"
-    )
-  end
-
-  def set_test_response_header
-    related_links_variant.configure_response(response)
-  end
-end
diff --git a/app/controllers/content_items_controller.rb b/app/controllers/content_items_controller.rb
index c250a593b..a3d0eb42d 100644
--- a/app/controllers/content_items_controller.rb
+++ b/app/controllers/content_items_controller.rb
@@ -56,11 +56,6 @@ def set_guide_draft_access_token
 
   def load_content_item
     content_item = Services.content_store.content_item(content_item_path)
-
-    if related_links_variant.variant?('C') && content_item.dig('links')
-      content_item['links']['ordered_related_items'] = content_item['links'].fetch('suggested_ordered_related_items', [])
-    end
-
     @content_item = PresenterBuilder.new(content_item, content_item_path).presenter
   end
 
diff --git a/app/views/layouts/application.html.erb b/app/views/layouts/application.html.erb
index 22f9fc0b2..282739496 100644
--- a/app/views/layouts/application.html.erb
+++ b/app/views/layouts/application.html.erb
@@ -21,8 +21,6 @@
   <%= csrf_meta_tags %>
   <%= render 'govuk_publishing_components/components/meta_tags', content_item: @content_item.content_item %>
 
-  <%= related_links_variant.analytics_meta_tag.html_safe %>
-
   <% if @content_item.description %>
     <meta name="description" content="<%= strip_tags(@content_item.description) %>" />
   <% end %>
diff --git a/test/controllers/content_items_controller_test.rb b/test/controllers/content_items_controller_test.rb
index 49a974dab..12d5a4e16 100644
--- a/test/controllers/content_items_controller_test.rb
+++ b/test/controllers/content_items_controller_test.rb
@@ -130,46 +130,6 @@ class ContentItemsControllerTest < ActionController::TestCase
     assert_equal content_item['title'], assigns[:content_item].title
   end
 
-  test "gets item from the content store and keeps ordered_related_items when running RelatedLinksABTest4 misclassification variant" do
-    with_variant RelatedLinksABTest4: 'A' do
-      content_item = content_store_has_schema_example('case_study', 'case_study')
-
-      get :show, params: { path: path_for(content_item) }
-      assert_response :success
-      assert_equal content_item['links']['ordered_related_items'], assigns[:content_item].content_item['links']['ordered_related_items']
-    end
-  end
-
-  test "gets item from the content store and keeps ordered_related_items when running RelatedLinksABTest4 control variant" do
-    with_variant RelatedLinksABTest4: 'B' do
-      content_item = content_store_has_schema_example('case_study', 'case_study')
-
-      get :show, params: { path: path_for(content_item) }
-      assert_response :success
-      assert_equal content_item['links']['ordered_related_items'], assigns[:content_item].content_item['links']['ordered_related_items']
-    end
-  end
-
-  test "gets item from the content store and replaces ordered_related_items when running RelatedLinksABTest4 test variant" do
-    with_variant RelatedLinksABTest4: 'C' do
-      content_item = content_store_has_schema_example('case_study', 'case_study')
-
-      get :show, params: { path: path_for(content_item) }
-      assert_response :success
-      assert_equal assigns[:content_item].content_item['links']['ordered_related_items'], assigns[:content_item].content_item['links']['suggested_ordered_related_items']
-    end
-  end
-
-  test "gets item from the content store and replaces ordered_related_items when empty array when RelatedLinksABTest4 test variant has no suggestions" do
-    with_variant RelatedLinksABTest4: 'C' do
-      content_item = content_store_has_schema_example('guide', 'guide')
-
-      get :show, params: { path: path_for(content_item) }
-      assert_response :success
-      assert_equal [], assigns[:content_item].content_item['links']['ordered_related_items']
-    end
-  end
-
   test "sets the expiry as sent by content-store" do
     content_item = content_store_has_schema_example('coming_soon', 'coming_soon')
     content_store_has_item(content_item['base_path'], content_item, max_age: 20)
diff --git a/test/controllers/development_controller_test.rb b/test/controllers/development_controller_test.rb
deleted file mode 100644
index 983e0e56d..000000000
--- a/test/controllers/development_controller_test.rb
+++ /dev/null
@@ -1,17 +0,0 @@
-require 'test_helper'
-
-class DevelopmentControllerTest < ActionController::TestCase
-  include GovukAbTesting::MinitestHelpers
-
-  %w(A B C).each do |test_variant|
-    test "RelatedLinksABTest4 works correctly for each variant (variant: #{test_variant})" do
-      with_variant RelatedLinksABTest4: test_variant do
-        get :index
-
-        ab_test = @controller.send(:related_links_test)
-        requested = ab_test.requested_variant(request.headers)
-        assert requested.variant?(test_variant)
-      end
-    end
-  end
-end