Data sources

Each page states its source and verification date. These are the main sources used:

• Transport module: live Underground line status from the Transport for London (TfL) Unified API, used without a key under TfL's open terms. Railcard, Oyster fare, airport and visa/ETA pages are editorial explainers sourced from nationalrail.co.uk, tfl.gov.uk and gov.uk, with the official link and a verification date on each page.
• Fuel module (UK): national average petrol and diesel pump prices from DESNZ, "Weekly road fuel prices" (Open Government Licence v3.0, © Crown copyright). The statutory Fuel Finder service (gov.uk) returned a 403 even with a browser-like User-Agent during verification, so this page uses the weekly national average instead of a live per-station lookup, with that limit explained on the page.