This file is a best fit lookup between 2011 lower layer super output areas, electoral wards/divisions and local authority districts in England and Wales as at 31 December 2017. (File Size - 7 MB)
Field Names - LSOA11CD, LSOA11NM, WD17CD, WD17NM, WD17NMW, LAD17CD, LAD17NM
Field Types - Text, Text, Text, Text, Text, Text, Text
Field Lengths - 9, 33, 9, 56, 45, 9, 28
W01000060 - Gwynedd 015B - now correctly allocated to W05000056 - Corris/Mawddwy - W06000002- Gwynedd
For more information and an overview of best-fitting follow this link -