UK Postcode to 2011 Census Geographies Best-Fit Lookup
A 24 MB lookup table provides a best-fit mapping between UK postcodes and frozen 2011 Census geographies, including Output Areas (OA), Lower and Middle Layer Super Output Areas (LSOA, MSOA), and current Local Authority Districts (LAD) as of August 2021. The mapping is created by plotting the mean address location of each postcode into the boundaries of the target geographies. Columns include postcode variants (PCD7, PCD8, PCDS), introduction/termination dates, user type, and codes and names for all geographic levels.