A lookup file between Local Authority Districts (2018) to 2020 Covid Infection Survey Geographys in Great Britain, as at 1 October 2020. (File size - 64KB) Field Names - LAD18CD, LAD18NM, LAD18NMW, CIS20CD, FIDField Types - Text, Text, Text, Text, NumericField Lengths - 9, 28, 24, 9FID = The FID, or Feature ID is created by the publication process when the names and codes / lookup products are published to the Open Geography portal. REST URL of Feature Access Service – https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/LAD18_CIS20_GB_LU_1de3fb723e594e379468decf62be9e58/FeatureServer