diff --git a/examples/data/ldcE.ts b/examples/data/ldcE.ts
index 34b4a34a..c8ba933c 100644
--- a/examples/data/ldcE.ts
+++ b/examples/data/ldcE.ts
@@ -1596,20 +1596,15 @@ export const validLDCE: Schema = {
     },
   ],
   metadata: {
+    organisation: 'Buckinghamshire',
+    id: '95f90e21-93f5-4761-90b3-815c673e041f',
+    source: 'PlanX',
     service: {
       flowId: '824628b2-deeb-48b0-92b1-2ca7f3b17163',
-      name: 'Apply for a lawful development certificate',
-      owner: 'Buckinghamshire',
       url: 'https://www.editor.planx.dev/buckinghamshire/apply-for-a-lawful-development-certificate/preview',
     },
-    session: {
-      source: 'PlanX',
-      id: '95f90e21-93f5-4761-90b3-815c673e041f',
-      createdAt: '2023-10-01 00:00:00',
-      submittedAt: '2023-10-02 00:00:00',
-    },
-    schema: {
-      url: 'https://theopensystemslab.github.io/digital-planning-data-schemas/v0.0.1/schema.json',
-    },
+    submittedAt: '2023-10-02 00:00:00',
+    schema:
+      'https://theopensystemslab.github.io/digital-planning-data-schemas/v0.0.1/schema.json',
   },
 };
diff --git a/examples/data/ldcP.ts b/examples/data/ldcP.ts
index 8b401c82..67b04c91 100644
--- a/examples/data/ldcP.ts
+++ b/examples/data/ldcP.ts
@@ -1112,20 +1112,15 @@ export const validLDCP: Schema = {
     },
   ],
   metadata: {
+    organisation: 'Buckinghamshire',
+    id: '8da51c5b-a2a0-4386-a15d-29d66f9c121c',
+    source: 'PlanX',
     service: {
       flowId: '824628b2-deeb-48b0-92b1-2ca7f3b17163',
-      name: 'Apply for a lawful development certificate',
-      owner: 'Buckinghamshire',
       url: 'https://www.editor.planx.dev/buckinghamshire/apply-for-a-lawful-development-certificate/preview',
     },
-    session: {
-      source: 'PlanX',
-      id: '8da51c5b-a2a0-4386-a15d-29d66f9c121c',
-      createdAt: '2023-10-01 00:00:00',
-      submittedAt: '2023-10-02 00:00:00',
-    },
-    schema: {
-      url: 'https://theopensystemslab.github.io/digital-planning-data-schemas/v0.0.1/schema.json',
-    },
+    submittedAt: '2023-10-02 00:00:00',
+    schema:
+      'https://theopensystemslab.github.io/digital-planning-data-schemas/v0.0.1/schema.json',
   },
 };
diff --git a/examples/data/planningPermission.ts b/examples/data/planningPermission.ts
index 92e7b286..626cb6fd 100644
--- a/examples/data/planningPermission.ts
+++ b/examples/data/planningPermission.ts
@@ -1690,20 +1690,15 @@ export const validPlanningPermission: Schema = {
     },
   ],
   metadata: {
+    organisation: 'Lambeth',
+    id: '81bcaa0f-baf5-4573-ba0a-ea868c573faf',
+    source: 'PlanX',
     service: {
       flowId: '01e38c5d-e701-4e44-acdc-4d6b5cc3b854',
-      name: 'Apply for planning permission',
-      owner: 'Lambeth',
       url: 'https://www.editor.planx.dev/lambeth/apply-for-planning-permission/preview',
     },
-    session: {
-      source: 'PlanX',
-      id: '81bcaa0f-baf5-4573-ba0a-ea868c573faf',
-      createdAt: '2023-10-01 00:00:00',
-      submittedAt: '2023-10-02 00:00:00',
-    },
-    schema: {
-      url: 'https://theopensystemslab.github.io/digital-planning-data-schemas/v0.0.1/schema.json',
-    },
+    submittedAt: '2023-10-02 00:00:00',
+    schema:
+      'https://theopensystemslab.github.io/digital-planning-data-schemas/v0.0.1/schema.json',
   },
 };
diff --git a/examples/data/priorApproval.ts b/examples/data/priorApproval.ts
index 36494082..8afe6820 100644
--- a/examples/data/priorApproval.ts
+++ b/examples/data/priorApproval.ts
@@ -1028,20 +1028,15 @@ export const validPriorApproval: Schema = {
     },
   ],
   metadata: {
+    organisation: 'Southwark',
+    id: 'b18c301b-9d44-4c6c-8d27-5b5bf33c570b',
+    source: 'PlanX',
     service: {
       flowId: 'c6628103-c648-4663-81e1-bfa0a1a18340',
-      name: 'Apply for prior approval',
-      owner: 'Southwark',
       url: 'https://www.editor.planx.dev/southwark/apply-for-prior-approval/preview',
     },
-    session: {
-      source: 'PlanX',
-      id: 'b18c301b-9d44-4c6c-8d27-5b5bf33c570b',
-      createdAt: '2023-10-01 00:00:00',
-      submittedAt: '2023-10-02 00:00:00',
-    },
-    schema: {
-      url: 'https://theopensystemslab.github.io/digital-planning-data-schemas/v0.0.1/schema.json',
-    },
+    submittedAt: '2023-10-02 00:00:00',
+    schema:
+      'https://theopensystemslab.github.io/digital-planning-data-schemas/v0.0.1/schema.json',
   },
 };
diff --git a/schema/schema.json b/schema/schema.json
index bc30b573..2053574c 100644
--- a/schema/schema.json
+++ b/schema/schema.json
@@ -1157,6 +1157,34 @@
       },
       "type": "object"
     },
+    "BaseMetadata": {
+      "$id": "#BaseMetadata",
+      "additionalProperties": false,
+      "description": "Minimum metadata expected for any application",
+      "properties": {
+        "id": {
+          "$ref": "#/definitions/UUID",
+          "description": "Unique identifier for this application"
+        },
+        "organisation": {
+          "description": "UK Local Authority that this application is being submitted to",
+          "type": "string"
+        },
+        "schema": {
+          "$ref": "#/definitions/URL"
+        },
+        "submittedAt": {
+          "$ref": "#/definitions/DateTime"
+        }
+      },
+      "required": [
+        "organisation",
+        "id",
+        "submittedAt",
+        "schema"
+      ],
+      "type": "object"
+    },
     "Date": {
       "format": "date",
       "type": "string"
@@ -2837,78 +2865,16 @@
       "type": "object"
     },
     "Metadata": {
-      "additionalProperties": false,
-      "properties": {
-        "schema": {
-          "additionalProperties": false,
-          "properties": {
-            "url": {
-              "$ref": "#/definitions/URL"
-            }
-          },
-          "required": [
-            "url"
-          ],
-          "type": "object"
-        },
-        "service": {
-          "$id": "#DigitalPlanningMetadata",
-          "additionalProperties": false,
-          "description": "Details of the digital planning service which sent the application",
-          "properties": {
-            "flowId": {
-              "$ref": "#/definitions/UUID"
-            },
-            "name": {
-              "type": "string"
-            },
-            "owner": {
-              "type": "string"
-            },
-            "url": {
-              "$ref": "#/definitions/URL"
-            }
-          },
-          "required": [
-            "flowId",
-            "name",
-            "owner",
-            "url"
-          ],
-          "type": "object"
+      "$id": "#DigitalPlanningMetadata",
+      "anyOf": [
+        {
+          "$ref": "#/definitions/BaseMetadata"
         },
-        "session": {
-          "additionalProperties": false,
-          "properties": {
-            "createdAt": {
-              "$ref": "#/definitions/DateTime"
-            },
-            "id": {
-              "$ref": "#/definitions/UUID"
-            },
-            "source": {
-              "const": "PlanX",
-              "default": "PlanX",
-              "type": "string"
-            },
-            "submittedAt": {
-              "$ref": "#/definitions/DateTime"
-            }
-          },
-          "required": [
-            "source",
-            "id",
-            "createdAt"
-          ],
-          "type": "object"
+        {
+          "$ref": "#/definitions/PlanXMetadata"
         }
-      },
-      "required": [
-        "service",
-        "session",
-        "schema"
       ],
-      "type": "object"
+      "description": "Details of the digital planning service which sent this application"
     },
     "MultiLineString": {
       "additionalProperties": false,
@@ -3123,6 +3089,56 @@
       ],
       "type": "object"
     },
+    "PlanXMetadata": {
+      "$id": "#PlanXMetadata",
+      "additionalProperties": false,
+      "description": "Additional metadata associated with applications submitted via PlanX",
+      "properties": {
+        "id": {
+          "$ref": "#/definitions/UUID",
+          "description": "Unique identifier for this application"
+        },
+        "organisation": {
+          "description": "UK Local Authority that this application is being submitted to",
+          "type": "string"
+        },
+        "schema": {
+          "$ref": "#/definitions/URL"
+        },
+        "service": {
+          "additionalProperties": false,
+          "properties": {
+            "flowId": {
+              "$ref": "#/definitions/UUID"
+            },
+            "url": {
+              "$ref": "#/definitions/URL"
+            }
+          },
+          "required": [
+            "flowId",
+            "url"
+          ],
+          "type": "object"
+        },
+        "source": {
+          "const": "PlanX",
+          "type": "string"
+        },
+        "submittedAt": {
+          "$ref": "#/definitions/DateTime"
+        }
+      },
+      "required": [
+        "id",
+        "organisation",
+        "schema",
+        "service",
+        "source",
+        "submittedAt"
+      ],
+      "type": "object"
+    },
     "PlanningConstraint": {
       "$id": "#PlanningConstraint",
       "anyOf": [
diff --git a/types/schema/Metadata.ts b/types/schema/Metadata.ts
index 47b1813a..c0dbfa13 100644
--- a/types/schema/Metadata.ts
+++ b/types/schema/Metadata.ts
@@ -1,26 +1,36 @@
 import {DateTime, URL, UUID} from './../utils';
 
-export interface Metadata {
+/**
+ * @id #DigitalPlanningMetadata
+ * @description Details of the digital planning service which sent this application
+ */
+export type Metadata = BaseMetadata | PlanXMetadata;
+
+/**
+ * @id #BaseMetadata
+ * @description Minimum metadata expected for any application
+ */
+export interface BaseMetadata {
+  /**
+   * @description UK Local Authority that this application is being submitted to
+   */
+  organisation: string; // @todo align to DLUHC Planning Application API curie
   /**
-   * @id #DigitalPlanningMetadata
-   * @description Details of the digital planning service which sent the application
+   * @description Unique identifier for this application
    */
+  id: UUID; // @todo align to DLUHC Planning Application API reference
+  submittedAt: DateTime;
+  schema: URL;
+}
+
+/**
+ * @id #PlanXMetadata
+ * @description Additional metadata associated with applications submitted via PlanX
+ */
+export interface PlanXMetadata extends BaseMetadata {
+  source: 'PlanX';
   service: {
-    flowId: UUID | string; // @todo temp fix for failing UUID validation, sort out and tighten
-    name: string;
-    owner: string;
-    url: URL;
-  };
-  session: {
-    /**
-     * @default PlanX
-     */
-    source: 'PlanX';
-    id: UUID | string;
-    createdAt: DateTime;
-    submittedAt?: DateTime;
-  };
-  schema: {
+    flowId: UUID;
     url: URL;
   };
 }