This is a best fit lookup between 2011 Census Output Areas (OA), wards and local authority districts (LAD) as at December 2015 in England and Wales. (File Size 12KB).Field Names – OA11CD, WD15CD, WD15NM, WD15NMW, LAD15CD, LAD15NM
Field Types – Text, Text, Text,
Text, Text, Text
Field Lengths – 9, 9, 56, 56, 9, 36REST URL of Feature Access Service – https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/OA11_WD15_LAD15_EW_LU_07437a810a0c4dbcbee044e7ecc26375/FeatureServer
For more information and an overview of best-fitting follow this link - https://geoportal.statistics.gov.uk/datasets/f0aac7ccbfd04cda9eb03e353c613faa/about