A lookup file between 2011 Output Areas to 2020 Covid Infection Survey Geography in the United Kingdom, as at 1 October 2020. (File size - 16MB) Field Names - OA11CD, CIS20CD, FIDField Types - Text, Text, NumericField Lengths - 9, 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/Output_Area_to_Covid_Infection_Survey__October_2020__Lookup_for_the_United_Kingdom/FeatureServer