Corrections · 11 August 2026
Prison population and capacity: 1 figure changed between vintages
This is a test of the revision detector, not a real revision. The “previous vintage” below is a copy of a genuine release with one figure altered on purpose, so that the detector could be shown to catch one. No publisher changed anything here.
Comparing our archived vintage of 2026-08-11-seeded-fixture with 2026-08-11, the Ministry of Justice has restated 1 figure for periods it had already published. 47,643 values were unchanged.
Periods affected: June 2026.
| Place | Period | Figure | Was | Now | Change |
|---|---|---|---|---|---|
| Leeds | June 2026 | Population | 1061 | 1071 | +10 |
How this was found
Both vintages were parsed with the same code that produced the published series, and compared value by value. Only periods present in both vintages are counted: a period the newer file adds is new data, not a revision. Values whose digits were reformatted without changing were set aside — there were 0 of those.
New periods in 2026-08-11: July 2026.
Found something else that does not add up? joshplawman@gmail.com. Everything in the log started with someone noticing.