Cookies

A cookie is a small piece of data a site asks your browser to store and hand back on later visits. It is how most sites recognise a returning visitor, keep a session open, or attribute a visit to a campaign. Local storage does a similar job with a different mechanism.

Nothing. No cookie, no local storage entry, no session storage entry and no other persistent identifier. If you open your browser’s storage inspector on any page of this site, the list for this domain is empty.

That is not a policy choice made to sound good; it is a consequence of what the site is. It is a set of static pages with no account system, no forms, no advertising and no analytics. There is nothing for a cookie to do here.

The figures you set in a calculator on this site live in the page while you are looking at it and are gone when you close the tab. They are not saved to your device and not sent anywhere — a reload starts you back at the defaults, which is the honest cost of storing nothing.

None, because there are no third parties. No script, font, image, video embed or stylesheet is loaded from another domain, so no other company is in a position to set a cookie through this site.

Links out to official services take you to somebody else’s site, which has its own cookie practices and its own notice about them.

A consent banner exists to obtain agreement to storing or reading information on your device. This site does neither, so there is nothing to obtain agreement for, and a banner would be a piece of theatre that made the site slower and harder to read.

If the position ever changes, the banner appears in the same edit as the thing it is about — not afterwards.

If you believe something on this site is storing data on your device, that would be a defect and we would want to know: [email protected].

Last reviewed 10 August 2026