diff --git a/lib/govuk_publishing_components/components/related_navigation_helper.rb b/lib/govuk_publishing_components/components/related_navigation_helper.rb
index 700728980e..f6a4a2ff78 100644
--- a/lib/govuk_publishing_components/components/related_navigation_helper.rb
+++ b/lib/govuk_publishing_components/components/related_navigation_helper.rb
@@ -24,7 +24,6 @@ def related_navigation
       { "topical_events" => related_topical_events },
       { "world_locations" => related_world_locations },
       { "statistical_data_sets" => related_statistical_data_sets },
-      { "worldwide_organisations" => related_worldwide_organisations },
     ]
 
     other = [related_external_links, related_contacts] || []
@@ -100,11 +99,6 @@ def related_world_locations
     build_links_for_sidebar(locations)
   end
 
-  def related_worldwide_organisations
-    organisations = filter_link_type("worldwide_organisations", "worldwide_organisation")
-    build_links_for_sidebar(organisations)
-  end
-
   def related_collections
     collections = filter_link_type("document_collections", "document_collection")
     build_links_for_sidebar(collections)
@@ -172,7 +166,7 @@ def parent
   end
 
   def grandparent
-    parent.dig("parent", 0)
+    parent.dig("links", "parent", 0)
   end
 
   # This method post-processes the topics collated by the helper.
@@ -214,12 +208,14 @@ def tagged_to_same_mainstream_browse_page
 
   def parents_tagged_to_same_mainstream_browse_page
     return [] unless parent && grandparent
-
-    common_parent_content_ids = tagged_to_same_mainstream_browse_page.map(&:content_id)
+    common_parent_content_ids = tagged_to_same_mainstream_browse_page.map { |item| item["content_id"] }
 
     @parents_tagged_to_same_mainstream_browse_page ||= related_links.select do |related_item|
       next if common_parent_content_ids.include?(related_item["content_id"])
-      related_item.dig("links", "mainstream_browse_pages").map(&:parent).map(&:content_id).include?(grandparent["content_id"])
+      mainstream_browse_pages = related_item.dig("links", "mainstream_browse_pages")
+      parents = mainstream_browse_pages.map { |page| page["links"]["parent"][0] }
+      content_ids = parents.map { |parent| parent["content_id"] }
+      content_ids.include?(grandparent["content_id"])
     end
   end
 
diff --git a/spec/lib/related_navigation_helper_spec.rb b/spec/lib/related_navigation_helper_spec.rb
index 56cc2c397c..5f3a032dac 100644
--- a/spec/lib/related_navigation_helper_spec.rb
+++ b/spec/lib/related_navigation_helper_spec.rb
@@ -30,7 +30,6 @@ def payload_for(schema, content_item)
         { "topical_events" => [] },
         { "world_locations" => [] },
         { "statistical_data_sets" => [] },
-        { "worldwide_organisations" => [] },
       ]
 
       expect(nothing).to eq(expected)
@@ -138,49 +137,11 @@ def payload_for(schema, content_item)
         { "topical_events" => [{ path: "/related-topical-event", text: "related topical event" }] },
         { "world_locations" => [{ path: "/world/world-location/news", text: "World, ~ (@Location)" }] },
         { "statistical_data_sets" => [] },
-        { "worldwide_organisations" => [] },
       ]
 
       expect(payload).to eql(expected)
     end
 
-    it "returns worldwide organisations" do
-      payload = payload_for("world_location_news_article",
-        "details" => {
-          "body" => "body",
-          "government" => {
-            "title" => "government",
-            "slug" => "government",
-            "current" => true
-          },
-          "political" => true,
-          "first_public_at" => "2016-01-01T19:00:00Z",
-        },
-        "links" => {
-          "worldwide_organisations" => [
-            {
-              "content_id" => "32c1b93d-2553-47c9-bc3c-fc5b513ecc32",
-              "title" => "related worldwide organisation",
-              "base_path" => "/related-worldwide-organisation",
-              "document_type" => "worldwide_organisation",
-              "locale" => "en"
-            }
-          ],
-        })
-      expected = [
-        { "related_items" => [] },
-        { "related_guides" => [] },
-        { "collections" => [] },
-        { "topics" => [] },
-        { "policies" => [] },
-        { "topical_events" => [] },
-        { "world_locations" => [] },
-        { "statistical_data_sets" => [] },
-        { "worldwide_organisations" => [{ path: "/related-worldwide-organisation", text: "related worldwide organisation" }] },
-      ]
-      expect(payload).to eql(expected)
-    end
-
     it "returns statistical data sets" do
       payload = payload_for("publication",
         "details" => {
@@ -214,7 +175,6 @@ def payload_for(schema, content_item)
         { "topical_events" => [] },
         { "world_locations" => [] },
         { "statistical_data_sets" => [{ path: "/related-statistical-data-set", text: "related statistical data set" }] },
-        { "worldwide_organisations" => [] },
       ]
       expect(payload).to eql(expected)
     end
@@ -263,12 +223,97 @@ def payload_for(schema, content_item)
         { "topical_events" => [] },
         { "world_locations" => [] },
         { "statistical_data_sets" => [] },
-        { "worldwide_organisations" => [] },
       ]
 
       expect(payload).to eql(expected)
     end
 
+    it "returns parent and grandparent topics" do
+      payload = payload_for("answer",
+        "links" => {
+          "parent" => [
+            {
+              "base_path" => "/browse/working/tax-minimum-wage",
+              "content_id" => "a3e4b233-e2f3-4709-b531-8da7f21a3f6d",
+              "locale" => "en",
+              "title" => "Your pay, tax and the National Minimum Wage",
+              "links" => {
+                "parent" => [
+                  {
+                    "base_path" => "/browse/working",
+                    "content_id" => "a24f0662-bbfe-4b77-9ec0-e73240e88b9a",
+                    "locale" => "en",
+                    "title" => "Working, jobs and pensions",
+                  }
+                ]
+              },
+            }
+          ],
+          "ordered_related_items" => [
+            {
+              "base_path" => "/apprenticeships-guide",
+              "content_id" => "b95f3e83-a8d1-40fa-843c-cb712861707d",
+              "locale" => "en",
+              "title" => "Become an apprentice",
+              "links" => {
+                "mainstream_browse_pages" => [
+                  {
+                    "base_path" => "/browse/working/finding-job",
+                    "content_id" => "eceb3053-43d1-4a49-873d-85ff9ade7066",
+                    "locale" => "en",
+                    "title" => "Finding a job",
+                    "links" => {
+                      "parent" => [
+                        {
+                          "base_path" => "/browse/working",
+                          "content_id" => "a24f0662-bbfe-4b77-9ec0-e73240e88b9a",
+                          "locale" => "en",
+                          "title" => "Working, jobs and pensions",
+                        }
+                      ]
+                    },
+                  }
+                ]
+              },
+            },
+            {
+              "base_path" => "/national-insurance",
+              "content_id" => "c995522c-4020-4d54-ae5d-271d4b3a8777",
+              "locale" => "en",
+              "title" => "National Insurance",
+              "links" => {
+                "mainstream_browse_pages" => [
+                  {
+                    "base_path" => "/browse/working/tax-minimum-wage",
+                    "content_id" => "a3e4b233-e2f3-4709-b531-8da7f21a3f6d",
+                    "locale" => "en",
+                    "title" => "Your pay, tax and the National Minimum Wage",
+                    "links" => {
+                      "parent" => [
+                        {
+                          "base_path" => "/browse/working",
+                          "content_id" => "a24f0662-bbfe-4b77-9ec0-e73240e88b9a",
+                          "locale" => "en",
+                          "title" => "Working, jobs and pensions",
+                        }
+                      ]
+                    },
+                  }
+                ]
+              },
+            }
+          ]
+        })
+
+      expected = {
+        "topics" => [
+          { text: "Your pay, tax and the National Minimum Wage", path: "/browse/working/tax-minimum-wage" },
+          { text: "Working, jobs and pensions", path: "/browse/working" },
+        ]
+      }
+      expect(payload).to include(expected)
+    end
+
     it "returns an Elsewhere on the web section for external related links" do
       payload = payload_for("placeholder",
         "details" => {