This file is a best fit lookup between Output Areas (2021), Civil Parishes/Non-Civil Parished Areas, Lower Tier Local Authorities, Upper Tier Local Authorities, Regions and Country in England and Wales as at May 2022. (File Size - 100 MB)Field Names - OA21CD, PAR22CD, PAR22NM, PAR22NMW, LTLA22CD, LTLA22NM, LTLA22NMW, UTLA22CD, UTLA22NM, UTLA22NMW, RGN22CD, RGN22NM, RGN22NMW, CTRY22CD, CTRY22NM, CTRY22NMW, NAT22CD, NAT22NM, NAT22NMWField Types - Text, Text, Text, Text, Text,Text, Text, Text, Text, Text,Text, Text, Text, Text, Text,Text, Text, Text, TextField Lengths - 9, 9, 66, 42, 9, 35, 24, 9 35, 24, 9, 24, 5, 9, 7, 6, 9, 17, 14REST URL of Feature Access Service – https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/OAs_2021_to_Civil_Parish_and_Non_Civil_Parished_Areas_to_LTLA_to_UTLA_to_Re_2022/FeatureServer
For more information and an overview of best-fitting follow this link - https://geoportal.statistics.gov.uk/datasets/f0aac7ccbfd04cda9eb03e353c613faa/about