A lookup between Output Areas (OA), Lower Layer Super Output Areas (LSOA), Middle Layer Super Output Areas (MSOA) and local authority districts (LAD) including OA and LAD classifications as at 31 December 2017 in Great Britain. (File size - 142 MB). Field Names - OA11CD, OAC11CD, OAC11NM, LSOA11CD, LSOA11NM, SOAC11CD, SOAC11NM, MSOA11CD, MSOA11NM, LAD17CD, LAD17NM, LAC11CD, LAC11NM, RGN11CD, RGN11NM, CTRY11CD, CTRY11NMField Types - Text, Text, Text, Text, Text, Text, Text, Text, Text, Text, Text, Text, Text, Text, Text, Text, TextField Lengths - 9, 3, 44, 9, 62, 2, 35, 9, 58, 9, 36, 4, 36, 9, 24, 9, 17This file has been updated to include the SOA classification name and code.