A lookup between 2021 Output Areas (OA) and County and Unitary Authorities (CTYUA) (Counties, Unitary Authorities, Metropolitan Districts and London Boroughs) as at 4th May 2023 in England and Wales. (File Size 6.1 MB).
Field Names – OA21CD, CTYUA23CD, CTYUA23NM, CTYUA23NMW
Field Types – Text, Text, Text, Text
Field Lengths – 9, 9, 35, 24
For more information and an overview of best-fitting follow this link - https://geoportal.statistics.gov.uk/datasets/f0aac7ccbfd04cda9eb03e353c613faa/about
