diff --git a/.github/scripts/audit-multizone-tracking.mjs b/.github/scripts/audit-multizone-tracking.mjs
index 439fff687..00d0e7c0a 100644
--- a/.github/scripts/audit-multizone-tracking.mjs
+++ b/.github/scripts/audit-multizone-tracking.mjs
@@ -39,10 +39,10 @@ const SKIP_IF_CONTAINS = [
   "policyengine-slides.vercel.app",      // Internal slides, not in ads
 ];
 
-// File extensions that indicate a static-asset proxy rather than a
-// page. Static SVGs / images / fonts don't have a root layout to
-// install gtag into.
-const STATIC_ASSET_EXTS = [".svg", ".png", ".jpg", ".jpeg", ".gif", ".webp", ".ico", ".woff", ".woff2", ".ttf", ".css", ".js"];
+// File extensions that indicate a static-asset / data proxy rather
+// than a page. Static SVGs / images / fonts / data files don't have a
+// root layout to install gtag into.
+const STATIC_ASSET_EXTS = [".svg", ".png", ".jpg", ".jpeg", ".gif", ".webp", ".ico", ".woff", ".woff2", ".ttf", ".css", ".js", ".json"];
 
 // Pages that serve reference / documentation content where firing
 // tool_engaged would inflate conversion counts. Allowed to have gtag
diff --git a/website/next.config.ts b/website/next.config.ts
index 642a57196..116cddf5d 100644
--- a/website/next.config.ts
+++ b/website/next.config.ts
@@ -88,37 +88,112 @@ const nextConfig: NextConfig = {
       beforeFiles: [
         ...appZoneRewrites,
         // Household API docs (Vercel) — beforeFiles so it intercepts before Next.js trailing slash redirect
-        { source: "/us/api", destination: "https://household-api-docs-policy-engine.vercel.app/us/api/" },
-        { source: "/us/api/:path*", destination: "https://household-api-docs-policy-engine.vercel.app/us/api/:path*" },
+        {
+          source: "/us/api",
+          destination:
+            "https://household-api-docs-policy-engine.vercel.app/us/api/",
+        },
+        {
+          source: "/us/api/:path*",
+          destination:
+            "https://household-api-docs-policy-engine.vercel.app/us/api/:path*",
+        },
         // Python client docs — same household-api-docs deployment, served at top-level /us/python
-        { source: "/us/python", destination: "https://household-api-docs-policy-engine.vercel.app/us/python" },
-        { source: "/us/python/:path*", destination: "https://household-api-docs-policy-engine.vercel.app/us/python/:path*" },
+        {
+          source: "/us/python",
+          destination:
+            "https://household-api-docs-policy-engine.vercel.app/us/python",
+        },
+        {
+          source: "/us/python/:path*",
+          destination:
+            "https://household-api-docs-policy-engine.vercel.app/us/python/:path*",
+        },
         // Zone asset proxy — API docs uses assetPrefix: '/_zones/household-api-docs'
-        { source: "/_zones/household-api-docs/:path*", destination: "https://household-api-docs-policy-engine.vercel.app/_zones/household-api-docs/:path*" },
+        {
+          source: "/_zones/household-api-docs/:path*",
+          destination:
+            "https://household-api-docs-policy-engine.vercel.app/_zones/household-api-docs/:path*",
+        },
       ],
       // afterFiles: checked after pages/public files but before dynamic routes.
       afterFiles: [
+        // Student loan visualisation: the source HTML at student-loan-visualisation.vercel.app
+        // does `fetch('./data.json')`. Under the multizone rewrite at /uk/student-loan-visualisation
+        // (no trailing slash), the relative URL resolves to /uk/data.json. Proxy it so the
+        // figures and table render. Remove once the source repo uses an absolute path or basePath.
+        {
+          source: "/uk/data.json",
+          destination:
+            "https://student-loan-visualisation.vercel.app/data.json",
+        },
         // PostHog analytics proxy — first-party path bypasses ad blockers that
         // filter *.i.posthog.com. Static rule must come first.
-        { source: "/ingest/static/:path*", destination: "https://us-assets.i.posthog.com/static/:path*" },
-        { source: "/ingest/:path*", destination: "https://us.i.posthog.com/:path*" },
+        {
+          source: "/ingest/static/:path*",
+          destination: "https://us-assets.i.posthog.com/static/:path*",
+        },
+        {
+          source: "/ingest/:path*",
+          destination: "https://us.i.posthog.com/:path*",
+        },
         // State legislative tracker (Modal)
-        { source: "/_tracker/:path*", destination: "https://policyengine--state-legislative-tracker.modal.run/_tracker/:path*" },
+        {
+          source: "/_tracker/:path*",
+          destination:
+            "https://policyengine--state-legislative-tracker.modal.run/_tracker/:path*",
+        },
         // Tracker assets at root paths — temporary until tracker repo updates to use absolute URLs
-        { source: "/policyengine-favicon.svg", destination: "https://policyengine--state-legislative-tracker.modal.run/policyengine-favicon.svg" },
-        { source: "/policyengine-logo.svg", destination: "https://policyengine--state-legislative-tracker.modal.run/policyengine-logo.svg" },
+        {
+          source: "/policyengine-favicon.svg",
+          destination:
+            "https://policyengine--state-legislative-tracker.modal.run/policyengine-favicon.svg",
+        },
+        {
+          source: "/policyengine-logo.svg",
+          destination:
+            "https://policyengine--state-legislative-tracker.modal.run/policyengine-logo.svg",
+        },
         // Slides (Vercel)
-        { source: "/slides", destination: "https://policyengine-slides.vercel.app/slides" },
-        { source: "/slides/:path*", destination: "https://policyengine-slides.vercel.app/slides/:path*" },
+        {
+          source: "/slides",
+          destination: "https://policyengine-slides.vercel.app/slides",
+        },
+        {
+          source: "/slides/:path*",
+          destination: "https://policyengine-slides.vercel.app/slides/:path*",
+        },
         // Plugin blog (GitHub Pages)
-        { source: "/plugin-blog", destination: "https://policyengine.github.io/plugin-blog/" },
-        { source: "/plugin-blog/:path*", destination: "https://policyengine.github.io/plugin-blog/:path*" },
+        {
+          source: "/plugin-blog",
+          destination: "https://policyengine.github.io/plugin-blog/",
+        },
+        {
+          source: "/plugin-blog/:path*",
+          destination: "https://policyengine.github.io/plugin-blog/:path*",
+        },
         // TAXSIM (Vercel)
-        { source: "/us/taxsim", destination: "https://policyengine-taxsim-policy-engine.vercel.app/us/taxsim" },
-        { source: "/us/taxsim/:path*", destination: "https://policyengine-taxsim-policy-engine.vercel.app/us/taxsim/:path*" },
+        {
+          source: "/us/taxsim",
+          destination:
+            "https://policyengine-taxsim-policy-engine.vercel.app/us/taxsim",
+        },
+        {
+          source: "/us/taxsim/:path*",
+          destination:
+            "https://policyengine-taxsim-policy-engine.vercel.app/us/taxsim/:path*",
+        },
         // Model documentation (Vercel)
-        { source: "/:countryId/model", destination: "https://policyengine-model-phi.vercel.app/?country=:countryId" },
-        { source: "/:countryId/model/:path*", destination: "https://policyengine-model-phi.vercel.app/:path*?country=:countryId" },
+        {
+          source: "/:countryId/model",
+          destination:
+            "https://policyengine-model-phi.vercel.app/?country=:countryId",
+        },
+        {
+          source: "/:countryId/model/:path*",
+          destination:
+            "https://policyengine-model-phi.vercel.app/:path*?country=:countryId",
+        },
       ],
     };
   },