diff --git a/packages/gsul/src/getStatusUpdates.ts b/packages/gsul/src/getStatusUpdates.ts
index abada87188..30171b186d 100644
--- a/packages/gsul/src/getStatusUpdates.ts
+++ b/packages/gsul/src/getStatusUpdates.ts
@@ -81,10 +81,20 @@ export const filterOutFutureReduceToLatestUpdates = (
   })
 
   // flatten both regular and post-dated updates into single array
+  // but exclude post-dated updates if they have been revoked by a subsequent regular update
   const uniqueItems: Array<itemType> = []
   Object.values(itemGroups).forEach(group => {
     if (group.regular) uniqueItems.push(group.regular)
-    if (group.postDated) uniqueItems.push(group.postDated)
+    if (group.postDated) {
+      // Only include post-dated update if there's no regular update that came after it was set
+      const postDatedSetTime = Date.parse(group.postDated.postDatedLastModifiedSetAt)
+      const regularUpdateTime = group.regular ? Date.parse(group.regular.lastUpdateDateTime) : 0
+
+      // If the regular update came after the post-dated was set, it revokes the post-dated update
+      if (!group.regular || regularUpdateTime <= postDatedSetTime) {
+        uniqueItems.push(group.postDated)
+      }
+    }
   })
 
   const result: outputPrescriptionType = {
diff --git a/packages/gsul/tests/testBuildResult.test.ts b/packages/gsul/tests/testFilterOutFutureReduceToLatestUpdates.test.ts
similarity index 70%
rename from packages/gsul/tests/testBuildResult.test.ts
rename to packages/gsul/tests/testFilterOutFutureReduceToLatestUpdates.test.ts
index 918b817bf9..3f24cfdd62 100644
--- a/packages/gsul/tests/testBuildResult.test.ts
+++ b/packages/gsul/tests/testFilterOutFutureReduceToLatestUpdates.test.ts
@@ -7,12 +7,14 @@ type scenariosType = {
   inputPrescriptions: inputPrescriptionType
   queryResults: Array<itemType>
   expectedResult: outputPrescriptionType
+  currentTime: number
 }
 const now = new Date()
 const futureDateTime = new Date(now.valueOf() + (24 * 60 * 60 * 1000)).toISOString()
 const scenarios: Array<scenariosType> = [
   {
     scenarioDescription: "should return correct data when a matched prescription found",
+    currentTime: new Date("2000-01-01T00:00:00Z").getTime(),
     inputPrescriptions: {
       prescriptionID: "abc",
       odsCode: "123"
@@ -40,6 +42,7 @@ const scenarios: Array<scenariosType> = [
   },
   {
     scenarioDescription: "should return no items when empty item status are found",
+    currentTime: new Date("2000-01-01T00:00:00Z").getTime(),
     inputPrescriptions: {
       prescriptionID: "abc",
       odsCode: "123"
@@ -53,6 +56,7 @@ const scenarios: Array<scenariosType> = [
   },
   {
     scenarioDescription: "should return latest data when a multiple updates found",
+    currentTime: new Date("2000-01-01T00:00:00Z").getTime(),
     inputPrescriptions: {
       prescriptionID: "abc",
       odsCode: "123"
@@ -86,6 +90,7 @@ const scenarios: Array<scenariosType> = [
   },
   {
     scenarioDescription: "should return latest item for multiple updates for each of multiple statuses",
+    currentTime: new Date("2000-01-01T00:00:00Z").getTime(),
     inputPrescriptions: {
       prescriptionID: "abc",
       odsCode: "123"
@@ -137,6 +142,7 @@ const scenarios: Array<scenariosType> = [
   },
   {
     scenarioDescription: "should exclude item when post-dated update hasn't matured",
+    currentTime: new Date("2000-01-01T00:00:00Z").getTime(),
     inputPrescriptions: {
       prescriptionID: "abc",
       odsCode: "123"
@@ -158,6 +164,7 @@ const scenarios: Array<scenariosType> = [
   },
   {
     scenarioDescription: "should use latest post-dated update when multiple have matured",
+    currentTime: new Date("2000-01-01T00:00:00Z").getTime(),
     inputPrescriptions: {
       prescriptionID: "abc",
       odsCode: "123"
@@ -187,7 +194,7 @@ const scenarios: Array<scenariosType> = [
         itemId: "item_1",
         latestStatus: "With pharmacy",
         isTerminalState: false,
-        lastUpdateDateTime: "1970-01-03T00:00:00Z" // Back to 'With pharmacy'
+        lastUpdateDateTime: "1970-01-03T00:00:00Z" // revoke RTC, back to 'With pharmacy'
       },
       {
         itemId: "item_1",
@@ -219,6 +226,7 @@ const scenarios: Array<scenariosType> = [
   },
   {
     scenarioDescription: "should return an item when it _has_ matured even though the post-dated time is in the future",
+    currentTime: new Date("2000-01-01T00:00:00Z").getTime(),
     inputPrescriptions: {
       prescriptionID: "abc",
       odsCode: "123"
@@ -248,6 +256,7 @@ const scenarios: Array<scenariosType> = [
   },
   {
     scenarioDescription: "should return no items when empty item status are found",
+    currentTime: new Date("2000-01-01T00:00:00Z").getTime(),
     inputPrescriptions: {
       prescriptionID: "abc",
       odsCode: "123"
@@ -258,13 +267,89 @@ const scenarios: Array<scenariosType> = [
       onboarded: false,
       items: []
     }
+  },
+  {
+    scenarioDescription: "should return With pharmacy when RTC has been revoked",
+    currentTime: new Date("2025-12-11T12:00:00Z").getTime(),
+    inputPrescriptions: {
+      prescriptionID: "abc",
+      odsCode: "123"
+    },
+    queryResults: [
+      {
+        itemId: "item_1",
+        latestStatus: "Ready to collect",
+        isTerminalState: false,
+        lastUpdateDateTime: "2025-12-11T10:00:00Z",
+        postDatedLastModifiedSetAt: "2025-12-10T10:00:00Z"
+      },
+      {
+        itemId: "item_1",
+        latestStatus: "With pharmacy",
+        isTerminalState: false,
+        lastUpdateDateTime: "2025-12-10T11:00:00Z"
+      }
+    ],
+    expectedResult: {
+      prescriptionID: "abc",
+      onboarded: true,
+      items: [
+        {
+          itemId: "item_1",
+          latestStatus: "With pharmacy",
+          isTerminalState: false,
+          lastUpdateDateTime: "2025-12-10T11:00:00Z"
+        }
+      ]
+    }
+  },
+  {
+    scenarioDescription: "should return With pharmacy when RTC has been revoked but later RTC has matured",
+    currentTime: new Date("2025-12-11T19:00:00Z").getTime(),
+    inputPrescriptions: {
+      prescriptionID: "abc",
+      odsCode: "123"
+    },
+    queryResults: [
+      {
+        itemId: "item_1",
+        latestStatus: "Ready to collect",
+        isTerminalState: false,
+        lastUpdateDateTime: "2025-12-11T19:00:00Z",
+        postDatedLastModifiedSetAt: "2025-12-10T13:00:00Z"
+      },
+      {
+        itemId: "item_1",
+        latestStatus: "With pharmacy",
+        isTerminalState: false,
+        lastUpdateDateTime: "2025-12-10T11:00:00Z"
+      }
+    ],
+    expectedResult: {
+      prescriptionID: "abc",
+      onboarded: true,
+      items: [
+        {
+          itemId: "item_1",
+          latestStatus: "With pharmacy",
+          isTerminalState: false,
+          lastUpdateDateTime: "2025-12-10T11:00:00Z"
+        },
+        {
+          itemId: "item_1",
+          latestStatus: "Ready to collect",
+          isTerminalState: false,
+          lastUpdateDateTime: "2025-12-11T19:00:00Z",
+          postDatedLastModifiedSetAt: "2025-12-10T13:00:00Z"
+        }
+      ]
+    }
   }
 ]
 describe("Unit tests for buildResults", () => {
-  it.each<scenariosType>(scenarios)("$scenarioDescription", ({inputPrescriptions, queryResults, expectedResult}) => {
-    // Use a fixed time of 2000-01-01 for tests (946684800000 ms since epoch)
-    const fixedCurrentTime = new Date("2000-01-01T00:00:00Z").getTime()
-    const result = filterOutFutureReduceToLatestUpdates(inputPrescriptions, queryResults, fixedCurrentTime)
-    expect(result).toMatchObject(expectedResult)
-  })
+  it.each<scenariosType>(scenarios)("$scenarioDescription",
+    ({inputPrescriptions, queryResults, expectedResult, currentTime}) => {
+      const result = filterOutFutureReduceToLatestUpdates(inputPrescriptions, queryResults, currentTime)
+      expect(result).toMatchObject(expectedResult)
+    })
 })