Source Health Monitor

Every hyperlink behind a figure on this dashboard is checked automatically. Sources that prove persistent — live on two checks in a row — then settle into a fortnightly check, while anything broken, redirected or unreachable is retried daily until it is resolved. Checks now confirm the page itself still exists, including pages that answer but say "not found". Some publishers refuse automated visits even though the page opens fine in a browser — those are marked separately rather than as failures. "Check now" re-tests every link immediately.