diff --git a/CHANGELOG.md b/CHANGELOG.md
index f1731cbe90..b41c012924 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@
 
 ## Unreleased
 
+* Add cross domain linking to main GA property ([PR #2378](https://github.com/alphagov/govuk_publishing_components/pull/2378))
 * Fix organisation logo size when printing ([PR #2371](https://github.com/alphagov/govuk_publishing_components/pull/2371)) PATCH
 
 ## 27.8.0
diff --git a/app/assets/javascripts/govuk_publishing_components/analytics/google-analytics-universal-tracker.js b/app/assets/javascripts/govuk_publishing_components/analytics/google-analytics-universal-tracker.js
index 6107e366c9..cf9d9fd543 100644
--- a/app/assets/javascripts/govuk_publishing_components/analytics/google-analytics-universal-tracker.js
+++ b/app/assets/javascripts/govuk_publishing_components/analytics/google-analytics-universal-tracker.js
@@ -36,11 +36,20 @@
       fieldsObject = { cookieDomain: fieldsObject }
     }
 
+    function setLinkedDomains () {
+      var domains = window.GOVUK.analyticsVars.primaryLinkedDomains
+      if (domains && domains.length > 0) {
+        sendToGa('require', 'linker')
+        sendToGa('linker:autoLink', domains)
+      }
+    }
+
     configureProfile()
     anonymizeIp()
     disableAdFeatures()
     stripTitlePII()
     stripLocationPII()
+    setLinkedDomains()
   }
 
   GoogleAnalyticsUniversalTracker.load = function () {
diff --git a/app/assets/javascripts/govuk_publishing_components/analytics/init.js b/app/assets/javascripts/govuk_publishing_components/analytics/init.js
index a89a7324be..45b48ba045 100644
--- a/app/assets/javascripts/govuk_publishing_components/analytics/init.js
+++ b/app/assets/javascripts/govuk_publishing_components/analytics/init.js
@@ -3,9 +3,12 @@ var analyticsInit = function () {
 
   var analyticsVars = window.GOVUK.analyticsVars || false
   if (analyticsVars) {
-    var gaProperty = window.GOVUK.analyticsVars.gaProperty || false
-    var gaPropertyCrossDomain = window.GOVUK.analyticsVars.gaPropertyCrossDomain || false
-    var linkedDomains = window.GOVUK.analyticsVars.linkedDomains || false
+    // the property naming convention here isn't consistent, but used in static and
+    // govuk-account-manager-prototype, so hard to change
+    var primaryGaProperty = window.GOVUK.analyticsVars.gaProperty || false
+
+    var crossDomainGaProperty = window.GOVUK.analyticsVars.gaPropertyCrossDomain || false
+    var crossDomainLinkedDomains = window.GOVUK.analyticsVars.linkedDomains || false
   }
 
   window.GOVUK.Analytics.checkDigitalIdentityConsent = function (location) {
@@ -39,7 +42,7 @@ var analyticsInit = function () {
 
   // Disable analytics by default
   // This will be reversed below, if the consent cookie says usage cookies are allowed
-  var disabler = 'ga-disable-' + gaProperty
+  var disabler = 'ga-disable-' + primaryGaProperty
   window[disabler] = true
 
   if (consentCookie && consentCookie.usage) {
@@ -48,14 +51,14 @@ var analyticsInit = function () {
     // Load Google Analytics libraries
     window.GOVUK.StaticAnalytics.load()
 
-    if (gaProperty) {
+    if (primaryGaProperty) {
       // Use document.domain in dev, preview and staging so that tracking works
       // Otherwise explicitly set the domain as www.gov.uk (and not gov.uk).
       var cookieDomain = (document.domain === 'www.gov.uk') ? '.www.gov.uk' : document.domain
 
       // Configure profiles, setup custom vars, track initial pageview
       var analytics = new window.GOVUK.StaticAnalytics({
-        universalId: gaProperty,
+        universalId: primaryGaProperty,
         cookieDomain: cookieDomain,
         allowLinker: true
       })
@@ -63,8 +66,9 @@ var analyticsInit = function () {
       // Make interface public for virtual pageviews and events
       window.GOVUK.analytics = analytics
 
-      if (linkedDomains && linkedDomains.length > 0) {
-        window.GOVUK.analytics.addLinkedTrackerDomain(gaPropertyCrossDomain, 'govuk', linkedDomains)
+      // set up linking of domains for cross domain ga property
+      if (crossDomainLinkedDomains && crossDomainLinkedDomains.length > 0) {
+        window.GOVUK.analytics.addLinkedTrackerDomain(crossDomainGaProperty, 'govuk', crossDomainLinkedDomains)
       }
     }
   } else {