A best-fit lookup between postcodes, 2021 Census Output Areas (OA), Workplace Zones (WZ), Lower Layer Super Output Areas (LSOA), Middle Layer Super Output Areas (MSOA) and current local authority districts (LAD) along with OA, WZ, and LAD classifications as at August 2026 in the UK. Postcodes are best-fitted by plotting the location of the postcode's mean address into the areas of the output geographies. (File size 44MB).NOTE: This lookup now contains the 2021 classifications for OA and SOA. The opportunity has been taken to correct the field name terminators for classification indicators and their descriptions to ~IND and ~DESC from the previous use of ~CD and ~NM which are reserved for fields containing standard geography areas.Field Names - PCD7, PCD8, PCDS, DOINTR, DOTERM, USERTYPE, OSEAST1M, OSNRTH1M, OA21CD, OAC21IND, OAC21DESC, WZ11CD, WZC11IND, WZC11DESC, LSOA21CD, LSOA21NM, MSOA21CD, MSOA21NM, SOAC21IND, SOAC21DESC, LADCD, LADNM, LADNMW, LACIND, LACDESCField Types - All Text Field Lengths - 7, 8, 8, 6, 6, 1, 6, 7, 9, 3, 48, 9, 2, 60, 9, 63, 9, 35, 9, 36, 35, 3, 48