This file is a best-fit lookup between output areas (December 2011), electoral wards/divisions and local authority districts in England and Wales as at 31st December 2018. (File Size - 10 MB) Field Names - OA11CD, WD18CD, WD18NM, WD18NMW, LAD18CD, LAD18NMField Types - Text, Text, Text, Text, Text, TextField Lengths - 9, 9, 56, 45, 9, 28Four ward codes changed from previous 'interim' version to match OS BoundaryLineGarforth & Swillington - new code E05011393Kippax & Methley - new code E05011401Rothwell - new code E05011410Temple Newsam - new code E05011412