This file is a best-fit lookup between Output Areas and National Assembly for Wales constituencies (NAWC) and National Assembly for Wales electoral regions (NAWER) as at 31 December 2017 in Wales. (File size - 2MB)Field Names - OA11CD, NAWC17CD, NAWC17NM, NAWER17CD, NAWER17NMField Types - Text, Text, Text, Text, TextField Lengths - 9, 9, 39, 9, 19REST URL of Feature Access Service – https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/OA11_NAWC17_NAWER17_WA_LU_0e79cc22983a44f48d42ff7fc522de90/FeatureServer