diff --git a/.github/actions/acceptance-tests/action.yaml b/.github/actions/acceptance-tests/action.yaml
index d6735f77a..e063dab6b 100644
--- a/.github/actions/acceptance-tests/action.yaml
+++ b/.github/actions/acceptance-tests/action.yaml
@@ -77,9 +77,16 @@ runs:
         TEST_TYPE: ${{ inputs.testType }}
         ENVIRONMENT: ${{ inputs.targetEnvironment }}
         PLAYWRIGHT_SHARD: ${{ inputs.shard }}
+    - name: Sanitise shard for artifact name
+      id: shard_label
+      if: ${{ inputs.testType == 'integration' && inputs.shard != '' }}
+      shell: bash
+      run: echo "value=${SHARD//\// of }" >> $GITHUB_OUTPUT
+      env:
+        SHARD: ${{ inputs.shard }}
     - name: Archive integration test results
       if: ${{ inputs.testType == 'integration' }}
       uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
       with:
-        name: Integration test report
+        name: Integration test report${{ inputs.shard != '' && format(' ({0})', steps.shard_label.outputs.value) || '' }}
         path: "tests/playwright/playwright-report"
diff --git a/lambdas/core-notifier-lambda/src/__tests__/apis/sqs-handler.test.ts b/lambdas/core-notifier-lambda/src/__tests__/apis/sqs-handler.test.ts
index fd7046aad..c19446a44 100644
--- a/lambdas/core-notifier-lambda/src/__tests__/apis/sqs-handler.test.ts
+++ b/lambdas/core-notifier-lambda/src/__tests__/apis/sqs-handler.test.ts
@@ -155,6 +155,7 @@ describe('createHandler', () => {
           description: 'Failed processing message',
           messageId: sqsEvent.Records[0].messageId,
           senderId: validSender.senderId,
+          messageReference,
         }),
       );
     });
@@ -227,6 +228,7 @@ describe('createHandler', () => {
         description: 'Failed processing message',
         messageId,
         senderId: undefined,
+        messageReference: undefined,
       });
       expect(mockLogger.info).toHaveBeenCalledWith({
         description: '0 of 1 records processed successfully',
@@ -257,6 +259,7 @@ describe('createHandler', () => {
         description: 'Failed processing message',
         messageId,
         senderId: validSender.senderId,
+        messageReference,
       });
       expect(
         mockEventPublisher.sendEvents<MessageRequestRejected>,
@@ -301,6 +304,7 @@ describe('createHandler', () => {
         description: 'Failed processing message',
         messageId,
         senderId: validSender.senderId,
+        messageReference,
       });
       expect(mockEventPublisher.sendEvents).toHaveBeenCalledTimes(1);
       expect(mockEventPublisher.sendEvents).toHaveBeenCalledWith(
diff --git a/lambdas/core-notifier-lambda/src/apis/sqs-handler.ts b/lambdas/core-notifier-lambda/src/apis/sqs-handler.ts
index 015beff3e..591278f95 100644
--- a/lambdas/core-notifier-lambda/src/apis/sqs-handler.ts
+++ b/lambdas/core-notifier-lambda/src/apis/sqs-handler.ts
@@ -128,6 +128,7 @@ async function processSqsRecord(
       description: 'Failed processing message',
       messageId: sqsRecord.messageId,
       senderId: incoming?.data.senderId,
+      messageReference: incoming?.data.messageReference,
     });
 
     if (error instanceof RequestNotifyError && incoming && sender) {
diff --git a/tests/playwright/config/component/senders.setup.ts b/tests/playwright/config/component/senders.setup.ts
index 43fb2addb..26f142f5b 100644
--- a/tests/playwright/config/component/senders.setup.ts
+++ b/tests/playwright/config/component/senders.setup.ts
@@ -2,6 +2,7 @@ import { test as setup } from '@playwright/test';
 import senderRepository from 'helpers/sender-helpers';
 import { Sender } from 'utils';
 import {
+  ROUTING_CONFIG_ID,
   SENDER_ID_SKIPS_NOTIFY,
   SENDER_ID_THAT_TRIGGERS_ERROR_IN_NOTIFY_SANDBOX,
   SENDER_ID_VALID_FOR_NOTIFY_SANDBOX,
@@ -20,7 +21,7 @@ const testSenders: Sender[] = [
     senderName: 'componentTestSender_RoutingConfig',
     meshMailboxSenderId: 'meshMailboxSender1',
     meshMailboxReportsId: 'meshMailboxReports1',
-    routingConfigId: 'b838b13c-f98c-4def-93f0-515d4e4f4ee1',
+    routingConfigId: ROUTING_CONFIG_ID,
     fallbackWaitTimeSeconds: 100,
   },
   {
diff --git a/tests/playwright/constants/tests-constants.ts b/tests/playwright/constants/tests-constants.ts
index 9cd18aef5..7d2d40f8c 100644
--- a/tests/playwright/constants/tests-constants.ts
+++ b/tests/playwright/constants/tests-constants.ts
@@ -17,15 +17,21 @@ export const ENVIRONMENT_SPECIFIC_CONSTANTS = {
   // Suppliers Dev Account
   '820178564574': {
     nhsAppBaseUrl: 'https://example.com',
+    routingConfigId: 'b838b13c-f98c-4def-93f0-515d4e4f4ee1',
   },
 
   // Suppliers Non Prod Account
   '885964308133': {
     nhsAppBaseUrl: 'https://www-onboardingaos.nhsapp.service.nhs.uk',
+    routingConfigId: 'c940a9ce-e70d-4986-8046-afd168b39738',
   },
 };
 
-export const NHS_APP_BASE_URL =
+const ENVIRONMENT_CONFIG =
   ENVIRONMENT_SPECIFIC_CONSTANTS[
     AWS_ACCOUNT_ID_SAFE as keyof typeof ENVIRONMENT_SPECIFIC_CONSTANTS
-  ].nhsAppBaseUrl;
+  ];
+
+export const NHS_APP_BASE_URL = ENVIRONMENT_CONFIG.nhsAppBaseUrl;
+
+export const ROUTING_CONFIG_ID = ENVIRONMENT_CONFIG.routingConfigId;
diff --git a/tests/playwright/digital-letters-component-tests/core-notify.component.spec.ts b/tests/playwright/digital-letters-component-tests/core-notify.component.spec.ts
index 1d2a42d47..c653803af 100644
--- a/tests/playwright/digital-letters-component-tests/core-notify.component.spec.ts
+++ b/tests/playwright/digital-letters-component-tests/core-notify.component.spec.ts
@@ -192,7 +192,7 @@ test.describe('Digital Letters - Core Notify', () => {
   });
 
   test('given PDMResourceAvailable event, when client does NOT exist then it goes to DLQ', async () => {
-    test.setTimeout(250_000);
+    test.setTimeout(360_000);
     const eventId = uuidv4();
     const messageReference = uuidv4();
 
@@ -213,18 +213,21 @@ test.describe('Digital Letters - Core Notify', () => {
       validatePDMResourceAvailable,
     );
 
-    await Promise.all([
-      // Verify the event is processed and a message appears in the Lambda logs
-      expectToPassEventually(async () => {
-        const filteredLogs = await getLogsFromCloudwatch(
-          CORE_NOTIFIER_LAMBDA_LOG_GROUP_NAME,
-          ['$.message.description  = "0 of 1 records processed successfully"'],
-        );
-
-        expect(filteredLogs.length).toBeGreaterThanOrEqual(1);
-      }, 240),
-      // Verify there is a message in the DLQ
-      expectMessageContainingString(CORE_NOTIFIER_DLQ_NAME, eventId, 240),
-    ]);
+    // Verify the event is processed and a message appears in the Lambda logs
+    await expectToPassEventually(async () => {
+      const filteredLogs = await getLogsFromCloudwatch(
+        CORE_NOTIFIER_LAMBDA_LOG_GROUP_NAME,
+        [
+          '$.message.description  = "Failed processing message"',
+          '$.message.error  = "Sender not found for senderId: senderId_that_does_not_exist"',
+          `$.message.messageReference = "${messageReference}"`,
+        ],
+      );
+
+      expect(filteredLogs.length).toBeGreaterThanOrEqual(1);
+    }, 240);
+
+    // Verify there is a message in the DLQ
+    await expectMessageContainingString(CORE_NOTIFIER_DLQ_NAME, eventId, 300);
   });
 });