This site makes a promise on its Data page: we show our work, all of it. As of this week that’s a download, not a slogan.
The data appendix is a small ZIP of plain CSV files — every figure published on this site, machine-readable, each row carrying its source:
Because “evidence-led” ought to be checkable, or it’s just a nicer word for trust me. If a number on this site is wrong, someone with a spreadsheet should be able to catch it. We’d rather be corrected than comfortable — that’s how an engineer runs anything.
Found an error? Send it with a source to [email protected]. We’ll fix it, and we’ll say that we did.
The appendix is refreshed as its underlying sources are updated; each file carries its retrieval date.