Cookies and browser storage
Last updated 8 September 2026. There is no cookie banner on this site. This page explains why that is the correct answer rather than a missing feature.
1. Why there is no banner
Under the Privacy and Electronic Communications Regulations, consent is required to store or read information on someone's device unless that storage is strictly necessary to provide the service the user asked for. Everything this application stores falls in that exception: a sign-in session, and the preferences you set yourself, remembered so the application behaves the way you left it.
There is no analytics, no advertising, no tracking and no third-party script anywhere in this application. Nothing is loaded from a content delivery network belonging to anyone else, no pixel is fired, and no profile is built. There is nothing to ask you to consent to — and a banner asking for consent that is not needed trains people to click through the ones that are.
If that ever changes — if an analytics package or an embedded third party is ever added — a consent banner will appear in the same change, defaulting to off, and this page will say so.
2. Everything that is stored
| Name | Kind | What it holds | Why it is necessary | How long |
|---|---|---|---|---|
sb-<project>-auth-token | Cookie | Your sign-in session, set by Supabase. | Without it you would be signed out on every page load. | Until you sign out, or the session expires. |
wvuk.theme | Local storage | Light or dark mode. | So the application does not flash white at a dark-mode user on every load. | Until you clear it. |
wvuk.ai.dismissed | Local storage | Which assistant suggestions you have dismissed. | So a suggestion you have waved away does not come straight back. | Until you clear it. |
wvuk.demo | Session storage | Whether you are looking around in demo mode. | So a demo session survives a page refresh instead of dumping you at a sign-in form. | Until the browser tab is closed. |
wvuk.learn.prefs | Session storage | Academy preferences while in demo mode, where there is no account to save them to. | So demo mode behaves like the real thing rather than forgetting every setting. | Until the browser tab is closed. |
3. Getting rid of them
Clearing site data in your browser removes all of it. The three preferences will simply return to their defaults; clearing the session cookie signs you out. Nothing breaks and nothing is lost — your records live in the database, not in your browser.