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This file contains the digital vector boundaries for Counties and Unitary Authorities, in the United Kingdom, as at December 2025.
The boundaries available are: (BUC) Ultra generalised (500m) - clipped to the coastline (Mean High Water mark).
Contains both Ordnance Survey and ONS Intellectual Property Rights.
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REST URL of Feature Access Service – https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/Counties_and_Unitary_Authorities_December_2025_Boundaries_UK_BUC/FeatureServer
Contact Office for National Statistics regarding this dataset
