Policy
Source and correction policy
How we back up claims and fix mistakes.
Sources
Factual claims should point to a source. Where a source is missing, the page says so rather than implying certainty.
Uncertainty
Proposals, estimates and intentions are labelled as such and kept separate from results.
Corrections
Tell us about a mistake with the report an error form. Substantive corrections are dated on the page that changed.
Complaints
If you are unhappy with how something was handled, use the complaints form.
Draft copy for editorial adoption. Last reviewed 15 October 2026. Editorial contact: to be confirmed.
Questions about this page?
Tell us what is unclear or wrong and we will review it.