Information this site uses
The pages contain no account creation, contact form, advertising tracker or analytics script. The budget worksheet runs in your browser. Its values are not sent by the application to a server and are not saved in cookies, local storage or a database. Refreshing the page resets the example.
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Your browser requests HTML, styles, scripts and images from the server hosting the guide. A hosting provider may process ordinary technical request data such as IP addresses and user agents according to its own policies. Cloudflare hosts this website. See Cloudflare’s privacy policy for its handling of connection data.
External sources
Links to government sources, transport operators, image credits and licences take you to other websites. Those websites have their own privacy practices. Fonts, scripts and displayed photographs are served with this site rather than embedded from a third-party service.
Policy updated 4 November 2026.