This file is a best fit lookup between 2021 Lower layer Super Output Areas, Electoral Wards/Divisions and Local Authority Districts in England and Wales as at May 2022. (File Size - 9 MB) Field Names - LSOA21CD, LSOA21NM, WD22CD, WD22NM, WD22NMW, LAD22CD, LAD22NM, LAD22NMWField Types - Text, Text, Text, Text, Text, Text, Text, TextField Lengths - 9, 40, 9, 80, 80, 9, 40, 40REST URL of Feature Access Service – https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/LSOA_2021_to_Ward_to_Lower_Tier_Local_Authority_May_2022_Lookup_for_England_2022/FeatureServer
For more information and an overview of best-fitting follow this link - https://geoportal.statistics.gov.uk/datasets/f0aac7ccbfd04cda9eb03e353c613faa/about