diff --git a/.gitignore b/.gitignore
index 5ceb386..100ba7f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 venv
+backend/__pycache__
diff --git a/frontend/app.js b/frontend/app.js
index 6eaa211..5bd3c55 100644
--- a/frontend/app.js
+++ b/frontend/app.js
@@ -118,6 +118,15 @@ const TERM_DEFINITIONS = {
   },
 };
 
+// Warning definitions for alerts/notices
+const WARNING_DEFINITIONS = {
+  progress_scores_unavailable: {
+    title: "Progress Scores Unavailable",
+    description:
+      "The DfE will not publish primary school progress measures for 2023-24 or 2024-25, as KS1 SATs were cancelled in 2020 and 2021.",
+  },
+};
+
 /**
  * Creates an info trigger button for a term tooltip
  * @param {string} termKey - Key from TERM_DEFINITIONS
@@ -132,6 +141,20 @@ function createInfoTrigger(termKey) {
   return `<button class="info-trigger" type="button" data-term="${termKey}" aria-label="${label}" aria-expanded="false"><svg class="info-icon" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" aria-hidden="true"><circle cx="8" cy="8" r="6.5"/><path d="M8 7v4"/><circle cx="8" cy="5" r="0.5" fill="currentColor" stroke="none"/></svg></button>`;
 }
 
+/**
+ * Creates a warning trigger button for warning tooltips
+ * @param {string} warningKey - Key from WARNING_DEFINITIONS
+ * @returns {string} HTML string for the warning trigger
+ */
+function createWarningTrigger(warningKey) {
+  const definition = WARNING_DEFINITIONS[warningKey];
+  if (!definition) return "";
+
+  const label = definition.title;
+
+  return `<button class="warning-trigger" type="button" data-warning="${warningKey}" aria-label="${label}" aria-expanded="false"><svg class="warning-icon" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" aria-hidden="true"><path d="M8 1.5L14.5 13H1.5L8 1.5z"/><path d="M8 6v3"/><circle cx="8" cy="11" r="0.5" fill="currentColor" stroke="none"/></svg></button>`;
+}
+
 // Map instances (stored to allow cleanup)
 const schoolMaps = new Map();
 
@@ -1368,7 +1391,7 @@ async function openSchoolModal(urn) {
             </div>
         </div>
         <div class="modal-stats-section">
-            <h4>Progress Scores</h4>
+            <h4>Progress Scores ${createWarningTrigger("progress_scores_unavailable")}</h4>
             <div class="modal-stats-grid">
                 <div class="modal-stat">
                     <div class="modal-stat-value ${getProgressClass(latest.reading_progress)}">${formatMetricValue(latest.reading_progress, "reading_progress")}</div>
@@ -1908,7 +1931,7 @@ class TooltipManager {
 
   handleMouseEnter(e) {
     if (!e.target || !e.target.closest) return;
-    const trigger = e.target.closest(".info-trigger");
+    const trigger = e.target.closest(".info-trigger, .warning-trigger");
     if (!trigger) return;
 
     clearTimeout(this.hideTimeout);
@@ -1919,7 +1942,7 @@ class TooltipManager {
 
   handleMouseLeave(e) {
     if (!e.target || !e.target.closest) return;
-    const trigger = e.target.closest(".info-trigger");
+    const trigger = e.target.closest(".info-trigger, .warning-trigger");
     const tooltip = e.target.closest(".tooltip");
 
     if (!trigger && !tooltip) return;
@@ -1927,7 +1950,7 @@ class TooltipManager {
     // Check if moving between trigger and tooltip
     const relatedTarget = e.relatedTarget;
     if (
-      relatedTarget?.closest?.(".info-trigger") === this.activeTooltip ||
+      relatedTarget?.closest?.(".info-trigger, .warning-trigger") === this.activeTooltip ||
       relatedTarget?.closest?.(".tooltip")
     ) {
       return;
@@ -1941,7 +1964,7 @@ class TooltipManager {
 
   handleFocusIn(e) {
     if (!e.target || !e.target.closest) return;
-    const trigger = e.target.closest(".info-trigger");
+    const trigger = e.target.closest(".info-trigger, .warning-trigger");
     if (!trigger) return;
 
     clearTimeout(this.hideTimeout);
@@ -1950,7 +1973,7 @@ class TooltipManager {
 
   handleFocusOut(e) {
     if (!e.target || !e.target.closest) return;
-    const trigger = e.target.closest(".info-trigger");
+    const trigger = e.target.closest(".info-trigger, .warning-trigger");
     if (!trigger) return;
 
     this.hideTimeout = setTimeout(() => {
@@ -1959,7 +1982,7 @@ class TooltipManager {
   }
 
   handleTouchClick(e) {
-    const trigger = e.target.closest(".info-trigger");
+    const trigger = e.target.closest(".info-trigger, .warning-trigger");
 
     if (trigger) {
       e.preventDefault();
@@ -1980,12 +2003,26 @@ class TooltipManager {
   }
 
   show(trigger) {
-    const termKey = trigger.dataset.term;
-    const definition = TERM_DEFINITIONS[termKey];
+    // Check if it's an info trigger or warning trigger
+    const isWarning = trigger.classList.contains("warning-trigger");
+    let definition;
 
-    if (!definition) {
-      console.warn(`No definition found for term: ${termKey}`);
-      return;
+    if (isWarning) {
+      const warningKey = trigger.dataset.warning;
+      definition = WARNING_DEFINITIONS[warningKey];
+      if (!definition) {
+        console.warn(`No definition found for warning: ${warningKey}`);
+        return;
+      }
+      this.tooltipEl.classList.add("tooltip-warning");
+    } else {
+      const termKey = trigger.dataset.term;
+      definition = TERM_DEFINITIONS[termKey];
+      if (!definition) {
+        console.warn(`No definition found for term: ${termKey}`);
+        return;
+      }
+      this.tooltipEl.classList.remove("tooltip-warning");
     }
 
     // Build tooltip content
diff --git a/frontend/index.html b/frontend/index.html
index 3f90f6f..8550644 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -327,10 +327,10 @@
                 </svg>
             </button>
             <div class="modal-header">
+                <button class="btn btn-primary modal-compare-btn" id="add-to-compare">Add to Compare</button>
                 <h2 id="modal-school-name"></h2>
                 <div class="modal-meta" id="modal-meta"></div>
                 <div class="modal-details" id="modal-details"></div>
-                <button class="btn btn-primary" id="add-to-compare">Add to Compare</button>
             </div>
             <div class="modal-body">
                 <div class="modal-chart-container">
diff --git a/frontend/styles.css b/frontend/styles.css
index 00e907a..fb92688 100644
--- a/frontend/styles.css
+++ b/frontend/styles.css
@@ -1059,6 +1059,7 @@ body {
 }
 
 .modal-header {
+    position: relative;
     padding: 2rem 2rem 1rem;
     border-bottom: 1px solid var(--border-color);
 }
@@ -1069,7 +1070,7 @@ body {
     font-weight: 700;
     color: var(--text-primary);
     margin-bottom: 0.5rem;
-    padding-right: 3rem;
+    padding-right: 10rem;
 }
 
 .modal-meta {
@@ -1088,8 +1089,10 @@ body {
     margin-bottom: 0.25rem;
 }
 
-.modal-header .btn {
-    margin-top: 1rem;
+.modal-compare-btn {
+    position: absolute;
+    top: 2rem;
+    right: 2rem;
 }
 
 .modal-details .modal-age-range {
@@ -1517,6 +1520,62 @@ body {
     opacity: 0.8;
 }
 
+/* Warning Trigger Button */
+.warning-trigger {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    padding: 0;
+    margin-left: 0.5rem;
+    background: none;
+    border: none;
+    cursor: help;
+    color: var(--accent-coral);
+    opacity: 0.8;
+    transition: var(--transition);
+    vertical-align: middle;
+    border-radius: 4px;
+}
+
+.warning-trigger:hover,
+.warning-trigger:focus {
+    opacity: 1;
+}
+
+.warning-trigger:focus {
+    outline: none;
+    box-shadow: 0 0 0 2px var(--accent-coral);
+}
+
+.warning-trigger:focus:not(:focus-visible) {
+    box-shadow: none;
+}
+
+.warning-trigger:focus-visible {
+    box-shadow: 0 0 0 2px var(--accent-coral);
+}
+
+/* Warning Icon SVG */
+.warning-icon {
+    width: 14px;
+    height: 14px;
+    flex-shrink: 0;
+}
+
+/* Warning Tooltip Styling */
+.tooltip.tooltip-warning {
+    background: #8b4513;
+    border-left: 3px solid var(--accent-coral);
+}
+
+.tooltip.tooltip-warning[data-placement="top"]::after {
+    border-top-color: #8b4513;
+}
+
+.tooltip.tooltip-warning[data-placement="bottom"]::after {
+    border-bottom-color: #8b4513;
+}
+
 /* Label wrapper for inline icon */
 .stat-label-with-info {
     display: inline-flex;