diff --git a/api.planx.uk/modules/webhooks/docs.yaml b/api.planx.uk/modules/webhooks/docs.yaml
index b200378244..d80e7eef85 100644
--- a/api.planx.uk/modules/webhooks/docs.yaml
+++ b/api.planx.uk/modules/webhooks/docs.yaml
@@ -29,8 +29,8 @@ components:
                     new:
                       type: object
                       properties:
-                        payload:
-                          $ref: "#/components/schemas/Payload"
+                        session_id:
+                          type: string
                         bops_id:
                           type: string
                         destination_url:
diff --git a/api.planx.uk/modules/webhooks/service/sendNotification/index.test.ts b/api.planx.uk/modules/webhooks/service/sendNotification/index.test.ts
index d3a4d25a54..b7d274c741 100644
--- a/api.planx.uk/modules/webhooks/service/sendNotification/index.test.ts
+++ b/api.planx.uk/modules/webhooks/service/sendNotification/index.test.ts
@@ -112,7 +112,7 @@ describe("Send Slack notifications endpoint", () => {
       event: {
         data: {
           new: {
-            payload: { sessionId: "xyz123" },
+            session_id: "xyz123",
             bops_id: "abc123",
             destination_url: "https://www.bops-production.com",
           },
diff --git a/api.planx.uk/modules/webhooks/service/sendNotification/index.ts b/api.planx.uk/modules/webhooks/service/sendNotification/index.ts
index e0dfd36947..57ffcc6862 100644
--- a/api.planx.uk/modules/webhooks/service/sendNotification/index.ts
+++ b/api.planx.uk/modules/webhooks/service/sendNotification/index.ts
@@ -45,7 +45,7 @@ const getMessageForEventType = (data: EventData, type: EventType) => {
 
 const getSessionIdFromEvent = (data: EventData, type: EventType) =>
   ({
-    "bops-submission": (data as BOPSEventData).payload?.sessionId,
+    "bops-submission": (data as BOPSEventData).session_id,
     "uniform-submission": (data as UniformEventData).payload?.sessionId,
     "email-submission": (data as EmailEventData).session_id,
   })[type];
diff --git a/api.planx.uk/modules/webhooks/service/sendNotification/schema.ts b/api.planx.uk/modules/webhooks/service/sendNotification/schema.ts
index e8cb1c4f74..545a4fb220 100644
--- a/api.planx.uk/modules/webhooks/service/sendNotification/schema.ts
+++ b/api.planx.uk/modules/webhooks/service/sendNotification/schema.ts
@@ -1,15 +1,11 @@
 import { z } from "zod";
 
-const payload = z.object({
-  sessionId: z.string(),
-});
-
 export const bopsSubmissionSchema = z.object({
   body: z.object({
     event: z.object({
       data: z.object({
         new: z.object({
-          payload,
+          session_id: z.string(),
           bops_id: z.string(),
           destination_url: z.string(),
         }),
@@ -26,7 +22,9 @@ export const uniformSubmissionSchema = z.object({
     event: z.object({
       data: z.object({
         new: z.object({
-          payload,
+          payload: z.object({
+            sessionId: z.string(),
+          }),
           submission_reference: z.string(),
           response: z.object({
             organisation: z.string(),