This file is a best fit lookup between Output Areas (2021), Civil Parishes/Non-Civil Parished Areas, Local Authorities, Counties/Unitary Authorities, Regions and Country in England and Wales as at 31st December 2024 (File Size - 25 MB) Field Names - OA21CD, PARNCP24CD, PARNCP24NM, PARNCP24NMW, LAD24CD, LAD24NMNM, LAD24NMW, CTYUA24CD, CTYUA24NM, CTYUA24NMW, RGN24CD, RGN24NM, RGN24NMW, CTRY24CD, CTRY24NM, CTRY24NMW, Field Types - Text, Text, Text, Text, Text,Text, Text, Text, Text, Text,Text, Text, Text, Text, Text,Text, Field Lengths - 9, 9, 66, 42, 9, 35, 24, 9 35, 24, 9, 24, 5, 9, 7, 6, This file published on 28th November 2024 is updated on 12th December 2025 to correct parish allocation of OA21 E00107679 being reassigned to Parish (PARNCP24) (E04003845) instead of E04003848. The erroneous allocation was due to boundary refinement work conducted by Ordnance Survey. This is an update product! Please check your version and download the updated product. See details on our dedicated notices page. For further questions or specific requirements, please contact the ONS Geography mailbox ONS.Geography@ons.gov.uk