diff --git a/common/app/conf/switches/ABTestSwitches.scala b/common/app/conf/switches/ABTestSwitches.scala
index aca242daf62..42bef7848cb 100644
--- a/common/app/conf/switches/ABTestSwitches.scala
+++ b/common/app/conf/switches/ABTestSwitches.scala
@@ -71,6 +71,17 @@ trait ABTestSwitches {
     highImpact = false,
   )
 
+  Switch(
+    ABTests,
+    "ab-consent-or-pay-banner",
+    "Test impact of adding consent or pay banner",
+    owners = Seq(Owner.withEmail("transparencyandconsent@theguardian.com")),
+    safeState = Off,
+    sellByDate = Some(LocalDate.of(2025, 12, 24)),
+    exposeClientSide = true,
+    highImpact = false,
+  )
+
   Switch(
     ABTests,
     "ab-the-trade-desk",
diff --git a/common/app/conf/switches/PrivacySwitches.scala b/common/app/conf/switches/PrivacySwitches.scala
index 2b4ba929691..41b6581e3cf 100644
--- a/common/app/conf/switches/PrivacySwitches.scala
+++ b/common/app/conf/switches/PrivacySwitches.scala
@@ -20,4 +20,16 @@ trait PrivacySwitches {
       "Warning: Requires ExCo sign-off. Disabling this switch will cost £160,000/day in ad-revenue, impact marketing, impact reader revenue...",
     ),
   )
+
+  val ConsentOrPay = Switch(
+    group = SwitchGroup.Privacy,
+    name = "consent-or-pay",
+    description = "Enable consent or pay logic",
+    owners =
+      Seq(Owner.withEmail("Transparency.and.consent@guardian.co.uk"), Owner.withEmail("identitydev@guardian.co.uk")),
+    safeState = On,
+    sellByDate = never,
+    exposeClientSide = true,
+    highImpact = true,
+  )
 }
diff --git a/common/app/experiments/Experiments.scala b/common/app/experiments/Experiments.scala
index e41d7a22ccf..e96b886edcc 100644
--- a/common/app/experiments/Experiments.scala
+++ b/common/app/experiments/Experiments.scala
@@ -15,6 +15,7 @@ object ActiveExperiments extends ExperimentsDefinition {
       LoopVideoTest,
       DCRCrosswords,
       DarkModeWeb,
+      ConsentOrPay,
     )
   implicit val canCheckExperiment: CanCheckExperiment = new CanCheckExperiment(this)
 }
@@ -58,3 +59,12 @@ object DarkModeWeb
       sellByDate = LocalDate.of(2025, 4, 30),
       participationGroup = Perc0D,
     )
+
+object ConsentOrPay
+    extends Experiment(
+      name = "consent-or-pay",
+      description = "Enable the switch for consent or paywall",
+      owners = Seq(Owner.withEmail("transparency.and.consent@guardian.co.uk ")),
+      sellByDate = LocalDate.of(2025, 12, 30),
+      participationGroup = Perc0E,
+    )
diff --git a/package.json b/package.json
index 22e8797faaa..28d67791d55 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
 		"@guardian/eslint-config-typescript": "9.0.1",
 		"@guardian/identity-auth": "3.0.0",
 		"@guardian/identity-auth-frontend": "6.0.3",
-		"@guardian/libs": "20.0.0",
+		"@guardian/libs": "0.0.0-canary-20250210172703",
 		"@guardian/prettier": "^8.0.1",
 		"@guardian/shimport": "^1.0.2",
 		"@guardian/source-foundations": "16.0.0",
diff --git a/static/src/javascripts/boot.js b/static/src/javascripts/boot.js
index 47fab0c5a70..25deacdf6f7 100644
--- a/static/src/javascripts/boot.js
+++ b/static/src/javascripts/boot.js
@@ -118,7 +118,12 @@ const go = () => {
 
         });
 
-        cmp.init({ pubData, country: await getLocale() });
+        cmp.init({
+            pubData,
+            country: await getLocale(),
+            isUserSignedIn: window.location.search.includes('CMP_SIGNED_IN'),
+            useNonAdvertisedList: window.location.search.includes('CMP_MAIN'),
+        });
 
         /**
          * Handle Ad blockers
diff --git a/static/src/javascripts/projects/common/modules/experiments/ab-tests.ts b/static/src/javascripts/projects/common/modules/experiments/ab-tests.ts
index e727132aafa..6a12f875508 100644
--- a/static/src/javascripts/projects/common/modules/experiments/ab-tests.ts
+++ b/static/src/javascripts/projects/common/modules/experiments/ab-tests.ts
@@ -1,5 +1,6 @@
 import type { ABTest } from '@guardian/ab-core';
 import { auxiaSignInGate } from './tests/auxia-sign-in-gate';
+import { consentOrPayBannerTest } from './tests/consent-or-pay-banner';
 import { remoteRRHeaderLinksTest } from './tests/remote-header-test';
 import { signInGateMainControl } from './tests/sign-in-gate-main-control';
 import { signInGateMainVariant } from './tests/sign-in-gate-main-variant';
@@ -7,6 +8,7 @@ import { signInGateMainVariant } from './tests/sign-in-gate-main-variant';
 // keep in sync with ab-tests in dotcom-rendering
 // https://github.com/guardian/dotcom-rendering/blob/main/dotcom-rendering/src/web/experiments/ab-tests.ts
 export const concurrentTests: readonly ABTest[] = [
+	consentOrPayBannerTest,
 	signInGateMainVariant,
 	signInGateMainControl,
 	remoteRRHeaderLinksTest,
diff --git a/static/src/javascripts/projects/common/modules/experiments/tests/consent-or-pay-banner.js b/static/src/javascripts/projects/common/modules/experiments/tests/consent-or-pay-banner.js
new file mode 100644
index 00000000000..5888f4ff18a
--- /dev/null
+++ b/static/src/javascripts/projects/common/modules/experiments/tests/consent-or-pay-banner.js
@@ -0,0 +1,27 @@
+export const consentOrPayBannerTest = {
+    id: 'ConsentOrPayBanner',
+    start: '2025-01-01',
+    expiry: '2025-12-31',
+    author: 'Akinsola Lawanson',
+    description:
+        'Test the consent or pay banner',
+    audience: 0.0,
+    audienceOffset: 0,
+    successMeasure: 'TBC',
+    audienceCriteria:
+        'all pageviews in UK',
+    dataLinkNames: 'consent-or-pay-banner',
+    idealOutcome: 'TBC',
+    showForSensitive: false,
+    canRun : () => true,
+    variants: [
+        {
+            id: 'activate',
+            test: () => {},
+        },
+        {
+            id: 'deactivate',
+            test: () => {},
+        },
+    ],
+}
diff --git a/yarn.lock b/yarn.lock
index 86d6508d46e..461e15a011c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3758,7 +3758,7 @@ __metadata:
     "@guardian/eslint-config-typescript": "npm:9.0.1"
     "@guardian/identity-auth": "npm:3.0.0"
     "@guardian/identity-auth-frontend": "npm:6.0.3"
-    "@guardian/libs": "npm:20.0.0"
+    "@guardian/libs": "npm:0.0.0-canary-20250210172703"
     "@guardian/prettier": "npm:^8.0.1"
     "@guardian/shimport": "npm:^1.0.2"
     "@guardian/source-foundations": "npm:16.0.0"
@@ -3915,16 +3915,16 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@guardian/libs@npm:20.0.0":
-  version: 20.0.0
-  resolution: "@guardian/libs@npm:20.0.0"
+"@guardian/libs@npm:0.0.0-canary-20250210172703":
+  version: 0.0.0-canary-20250210172703
+  resolution: "@guardian/libs@npm:0.0.0-canary-20250210172703"
   peerDependencies:
     tslib: ^2.6.2
     typescript: ~5.5.2
   peerDependenciesMeta:
     typescript:
       optional: true
-  checksum: 10c0/0ab14266f3de53da978a60dc0bcbf09cf9f5350fe070dbfd858d1bfa55bf8e802c18513c579674777e9a69efb2b1f672b815eb7c81b98c97b993ac68f73bda3c
+  checksum: 10c0/8132f86b9a3a239db7ebd803b2c47301ffa3457643a8283983e5226bb9fb091ff66b4707179e96ed7fee79a5a02260022d03b9dee86455f312d81c8aee42fdd9
   languageName: node
   linkType: hard