This file is a best fit lookup between output areas (December 2011), electoral wards/divisions and local authority districts in England and Wales as at 31st December 2020. (File Size - 10 MB)
Field Names - OA11CD, WD20CD, WD20NM, LAD20CD, LAD20NM, FID
Field Types - Text, Text, Text, Text, Text
Field Lengths - 9, 9, 53, 9, 35
NB: Electoral Change orders operative in May 2020 postponed until May 2021
File 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 -