A best fit lookup file of 2021 Output Areas to Westminster Parliamentary Constituencies to Regions in England and Wales as at May 2022. (File Size - 37 MB)Field Names - OA21CD, WPC22CD, WPC22NM, RGN22CD, RGN22NM, RGN22NMWField Types - Text, Text, Text, Text, Text, TextField Lengths - 9, 9, 43, 9, 24, 5REST URL of Feature Access Service – https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/OAs_2021_to_Westminster_Parliamentary_Constituency_to_Regions_May_2022_Look_2022/FeatureServer
For more information and an overview of best-fitting follow this link - https://geoportal.statistics.gov.uk/datasets/f0aac7ccbfd04cda9eb03e353c613faa/about