This file contains the digital vector boundaries for Counties and Unitary Authorities, in the United Kingdom as at May 2021.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. REST URL of Feature Access Service – https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/Counties_and_Unitary_Authorities_May_2021_UK_BUC_2022/FeatureServer REST URL of MapServer – https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/Counties_and_Unitary_Authorities_May_2021_UK_BUC_2022/MapServer REST URL of WFS Server – https://dservices1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/services/Counties_and_Unitary_Authorities_May_2021_UK_BUC_2022/WFSServer?service=wfs&request=getcapabilities