Release snapshot: GBR geometry 1.2.6
Earlier official administrative boundary editions remain in the retained source history. Their edition years do not assert a change date for each polygon.
The four-nation Admin 0–3 spine uses the reviewed May 2026 boundary sources, including the publisher-backed ward-to-local-authority relationship.
OS Open Names supplies the retained named community and settlement source detail.
Sources: Office for National Statistics and Ordnance Survey Open Names.