A lookup file of the lower tier local authorities (local authority districts, unitary authorities, metropolitan districts, London boroughs) to the upper tier local authorities (counties, metropolitan counties, inner and outer London, unitary authorities) in England and Wales as at 1st April 2020. (File Size = 23KB)Field Names - LTLA20CD, LTLA20NM, UTLA20CD, UTLA20NM, FIDField Types - Text, Text, Text, Text, NumericField Lengths - 9, 35, 9, 35FID = 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. File includes the following LAD changesE06000060 - Buckinghamshire - new unitary authority (Buckinghamshire county abolished)(Aylesbury Vale, Chiltern, South Bucks and Wycombe local authorities abolished)REST URL of Feature Access Service – https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/LTLA20_UTLA20_EW_LU_3791afa41dcc4daeab025767e16fcb93/FeatureServer