diff --git a/nextjs-app/__tests__/components/SecondarySchoolRow.test.tsx b/nextjs-app/__tests__/components/SecondarySchoolRow.test.tsx
index affaecb..a868256 100644
--- a/nextjs-app/__tests__/components/SecondarySchoolRow.test.tsx
+++ b/nextjs-app/__tests__/components/SecondarySchoolRow.test.tsx
@@ -44,3 +44,24 @@ describe('SecondarySchoolRow sixth-form tag', () => {
     expect(screen.queryByText('Sixth form')).not.toBeInTheDocument();
   });
 });
+
+describe('SecondarySchoolRow proposed-to-close tag', () => {
+  it('shows the tag when GIAS status is "Open, but proposed to close"', () => {
+    render(
+      <SecondarySchoolRow
+        school={{ ...base, status: 'Open, but proposed to close' }}
+      />,
+    );
+    expect(screen.getByText(/Proposed to close/)).toBeInTheDocument();
+  });
+
+  it('hides the tag for a plain open school', () => {
+    render(<SecondarySchoolRow school={{ ...base, status: 'Open' }} />);
+    expect(screen.queryByText(/Proposed to close/)).not.toBeInTheDocument();
+  });
+
+  it('hides the tag when status is missing', () => {
+    render(<SecondarySchoolRow school={base} />);
+    expect(screen.queryByText(/Proposed to close/)).not.toBeInTheDocument();
+  });
+});
diff --git a/nextjs-app/__tests__/lib/utils.test.ts b/nextjs-app/__tests__/lib/utils.test.ts
index 2a9c664..a1ebbbc 100644
--- a/nextjs-app/__tests__/lib/utils.test.ts
+++ b/nextjs-app/__tests__/lib/utils.test.ts
@@ -212,3 +212,14 @@ describe('computeYBounds', () => {
     expect(computeYBounds([], 'progress')).toEqual({});
   });
 });
+
+describe('isProposedToClose', () => {
+  const { isProposedToClose } = require('@/lib/utils');
+
+  it('is true only for the exact GIAS proposed-to-close status', () => {
+    expect(isProposedToClose({ status: 'Open, but proposed to close' })).toBe(true);
+    expect(isProposedToClose({ status: 'Open' })).toBe(false);
+    expect(isProposedToClose({ status: null })).toBe(false);
+    expect(isProposedToClose({})).toBe(false);
+  });
+});
diff --git a/nextjs-app/components/SchoolDetailView.module.css b/nextjs-app/components/SchoolDetailView.module.css
index e2ac1b8..b2b419a 100644
--- a/nextjs-app/components/SchoolDetailView.module.css
+++ b/nextjs-app/components/SchoolDetailView.module.css
@@ -1543,3 +1543,18 @@
 .historyDisclosure[open] > .historyToggle::before {
     transform: rotate(90deg);
 }
+
+/* GIAS "Open, but proposed to close" notice strip */
+.closingStrip {
+  background: #fdf6e3;
+  border-left: 4px solid #e2c96f;
+  border-radius: 0 6px 6px 0;
+  padding: 0.55rem 0.9rem;
+  margin: 0.5rem 0;
+  font-size: 0.88rem;
+  color: #6e5a00;
+  max-width: 68ch;
+}
+.closingStrip strong {
+  color: #8a6200;
+}
diff --git a/nextjs-app/components/SchoolDetailView.tsx b/nextjs-app/components/SchoolDetailView.tsx
index 8625278..ab0dfe1 100644
--- a/nextjs-app/components/SchoolDetailView.tsx
+++ b/nextjs-app/components/SchoolDetailView.tsx
@@ -18,7 +18,7 @@ import type {
   SchoolDeprivation, SchoolFinance, NationalAverages,
 } from '@/lib/types';
 import {
-  formatPercentage, formatProgress, formatAcademicYear,
+  formatPercentage, formatProgress, formatAcademicYear, isProposedToClose,
 } from '@/lib/utils';
 import { DeltaChip } from './DeltaChip';
 
@@ -313,6 +313,13 @@ export function SchoolDetailView({
                 <span className={styles.metaItem}>{schoolInfo.gender}&apos;s school</span>
               )}
             </div>
+            {isProposedToClose(schoolInfo) && (
+              <div className={styles.closingStrip} role="note">
+                <strong>⚠ Proposed to close</strong> — this school is proposed for closure,
+                although a formal closure process has not necessarily started. Check with the
+                local authority before applying.
+              </div>
+            )}
             {schoolInfo.address && (
               <p className={styles.address}>
                 {schoolInfo.address}{schoolInfo.postcode && `, ${schoolInfo.postcode}`}
diff --git a/nextjs-app/components/SchoolRow.module.css b/nextjs-app/components/SchoolRow.module.css
index 2bc0e47..20f03e8 100644
--- a/nextjs-app/components/SchoolRow.module.css
+++ b/nextjs-app/components/SchoolRow.module.css
@@ -254,3 +254,10 @@
     justify-content: center;
   }
 }
+
+/* GIAS "Open, but proposed to close" marker */
+.attrClosing {
+  background: #fdf6e3;
+  color: #8a6200;
+  border: 1px solid #e2c96f;
+}
diff --git a/nextjs-app/components/SchoolRow.tsx b/nextjs-app/components/SchoolRow.tsx
index 71fd763..43dc205 100644
--- a/nextjs-app/components/SchoolRow.tsx
+++ b/nextjs-app/components/SchoolRow.tsx
@@ -9,7 +9,7 @@
  */
 
 import type { School } from '@/lib/types';
-import { formatPercentage, calculateTrend, getPhaseStyle, schoolUrl, buildOfstedListBadge, formatAgeRange } from '@/lib/utils';
+import { formatPercentage, calculateTrend, getPhaseStyle, schoolUrl, buildOfstedListBadge, formatAgeRange, isProposedToClose } from '@/lib/utils';
 import styles from './SchoolRow.module.css';
 
 interface SchoolRowProps {
@@ -78,6 +78,9 @@ export function SchoolRow({
           {school.age_range && <span className={styles.attr}>{formatAgeRange(school.age_range)}</span>}
           {showDenomination && <span className={styles.attr}>{school.religious_denomination}</span>}
           {showGender && <span className={styles.attr}>{school.gender}</span>}
+          {isProposedToClose(school) && (
+            <span className={`${styles.attr} ${styles.attrClosing}`}>⚠ Proposed to close</span>
+          )}
         </div>
 
         {/* Line 3: Key stats */}
diff --git a/nextjs-app/components/SecondarySchoolDetailView.module.css b/nextjs-app/components/SecondarySchoolDetailView.module.css
index 1c90337..6ac06bf 100644
--- a/nextjs-app/components/SecondarySchoolDetailView.module.css
+++ b/nextjs-app/components/SecondarySchoolDetailView.module.css
@@ -1099,3 +1099,18 @@
         padding: 0.75rem;
     }
 }
+
+/* GIAS "Open, but proposed to close" notice strip */
+.closingStrip {
+  background: #fdf6e3;
+  border-left: 4px solid #e2c96f;
+  border-radius: 0 6px 6px 0;
+  padding: 0.55rem 0.9rem;
+  margin: 0.5rem 0;
+  font-size: 0.88rem;
+  color: #6e5a00;
+  max-width: 68ch;
+}
+.closingStrip strong {
+  color: #8a6200;
+}
diff --git a/nextjs-app/components/SecondarySchoolDetailView.tsx b/nextjs-app/components/SecondarySchoolDetailView.tsx
index 8210313..7246164 100644
--- a/nextjs-app/components/SecondarySchoolDetailView.tsx
+++ b/nextjs-app/components/SecondarySchoolDetailView.tsx
@@ -23,7 +23,7 @@ import type {
   SchoolAdmissions, SenDetail, Phonics,
   SchoolDeprivation, SchoolFinance, NationalAverages,
 } from '@/lib/types';
-import { formatPercentage, formatProgress, formatAcademicYear, formatAgeRange } from '@/lib/utils';
+import { formatPercentage, formatProgress, formatAcademicYear, formatAgeRange, isProposedToClose } from '@/lib/utils';
 import { DeltaChip } from './DeltaChip';
 import { track, getNavigationSource } from '@/lib/analytics';
 import styles from './SecondarySchoolDetailView.module.css';
@@ -237,6 +237,13 @@ export function SecondarySchoolDetailView({
                 </span>
               )}
             </div>
+            {isProposedToClose(schoolInfo) && (
+              <div className={styles.closingStrip} role="note">
+                <strong>⚠ Proposed to close</strong> — this school is proposed for closure,
+                although a formal closure process has not necessarily started. Check with the
+                local authority before applying.
+              </div>
+            )}
             {schoolInfo.address && (
               <p className={styles.address}>
                 {schoolInfo.address}{schoolInfo.postcode && `, ${schoolInfo.postcode}`}
diff --git a/nextjs-app/components/SecondarySchoolRow.module.css b/nextjs-app/components/SecondarySchoolRow.module.css
index 0949f11..ae64de6 100644
--- a/nextjs-app/components/SecondarySchoolRow.module.css
+++ b/nextjs-app/components/SecondarySchoolRow.module.css
@@ -266,3 +266,9 @@
     justify-content: center;
   }
 }
+
+.closingTag {
+  background: #fdf6e3;
+  color: #8a6200;
+  border: 1px solid #e2c96f;
+}
diff --git a/nextjs-app/components/SecondarySchoolRow.tsx b/nextjs-app/components/SecondarySchoolRow.tsx
index c32dab4..39c1256 100644
--- a/nextjs-app/components/SecondarySchoolRow.tsx
+++ b/nextjs-app/components/SecondarySchoolRow.tsx
@@ -11,7 +11,7 @@
 'use client';
 
 import type { School } from '@/lib/types';
-import { buildOfstedListBadge, getPhaseStyle, schoolUrl, formatAgeRange } from '@/lib/utils';
+import { buildOfstedListBadge, getPhaseStyle, schoolUrl, formatAgeRange, isProposedToClose } from '@/lib/utils';
 import styles from './SecondarySchoolRow.module.css';
 
 function detectAdmissionsTag(school: School): string | null {
@@ -97,6 +97,9 @@ export function SecondarySchoolRow({
               {admissionsTag}
             </span>
           )}
+          {isProposedToClose(school) && (
+            <span className={`${styles.provisionTag} ${styles.closingTag}`}>⚠ Proposed to close</span>
+          )}
         </div>
 
         {/* Line 3: KS4 stats */}
diff --git a/nextjs-app/lib/types.ts b/nextjs-app/lib/types.ts
index dc1cd2a..c29512c 100644
--- a/nextjs-app/lib/types.ts
+++ b/nextjs-app/lib/types.ts
@@ -18,6 +18,7 @@ export interface School {
   religious_denomination: string | null;
   age_range: string | null;
   has_sixth_form?: boolean | null;
+  status?: string | null; // GIAS establishment status ("Open" / "Open, but proposed to close")
 
   // Address
   address1: string | null;
diff --git a/nextjs-app/lib/utils.ts b/nextjs-app/lib/utils.ts
index 07b5d2e..fa1edf0 100644
--- a/nextjs-app/lib/utils.ts
+++ b/nextjs-app/lib/utils.ts
@@ -718,3 +718,18 @@ export function buildOfstedListBadge(school: {
 
   return { label: 'Not yet inspected', cssClass: 'ofstedPending' };
 }
+
+// ============================================================================
+// Establishment status
+// ============================================================================
+
+export const PROPOSED_TO_CLOSE_STATUS = 'Open, but proposed to close';
+
+/**
+ * GIAS lists some operating schools as "Open, but proposed to close".
+ * They remain open (and may stay open if the proposal is withdrawn), but the
+ * UI marks them so families check with the local authority before applying.
+ */
+export function isProposedToClose(school: { status?: string | null }): boolean {
+  return school.status === PROPOSED_TO_CLOSE_STATUS;
+}