This file is a best fit lookup between 2011 lower layer super output areas, electoral wards/divisions and local authority districts in England and Wales as at 31 December 2020 (File Size - 7 MB) Field Names - LSOA11CD, LSOA11NM, WD20CD, WD20NM, LAD20CD, LAD20NM, FIDField Types - Text, Text, Text, Text, Text, Text, TextField Lengths - 9, 33, 9, 53, 9, 35NB: Electoral Change orders operative in May 2020 postponed until May 2021File updated following receipt of The Leeds (Reorganisation of Community Governance) Amendment Order 2018. Boundary and code change for Garforth & Swillington, and Temple Newsam wards)FID = The FID, or Feature ID is created by the publication process when the names and codes / lookup products are published to the Open Geography portal.
For more information and an overview of best-fitting follow this link - https://geoportal.statistics.gov.uk/datasets/f0aac7ccbfd04cda9eb03e353c613faa/about
REST URL of Feature Access Service – https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/LSOA11_WD20_LAD20_EW_LU_v2_f514a75a131249caa65227cdc6275a21/FeatureServer