A lookup between Output Areas (OA), Lower layer Super Output Areas (LSOA), Middle layer Super Output Areas (LSOA) and Local Authority Districts (LAD) as at 31 December 2021 in England and Wales. (File Size 16.3MB).A version 3 has been released as it has been picked up that two OAs were in the wrong local authority. These were:E00074527 which was located in Bristol, rather than North Somerset unitary authorityW00004674 which was located in Carmarthenshire, rather than Swansea unitary authorityFile updated to include the Welsh equivalent names for LSOAs and MSOAsField Names – OA21CD, LSOA21CD, LSOA21NM, LSOA21NMW, MSOA21CD, MSOA21NM, MSOA21NMW, LAD22CD, LAD22NM, LAD22NMWField Types – Text, Text, Text, Text, Text, Text, Text, Text, Text, TextField Lengths – 9, 9, 40, 29, 9, 39, 28, 9, 35, 35