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 districts, London boroughs, unitary authorities) in England and Wales as at 31 December 2018. (File Size = 72KB)Field Names - LTLA18CD, LTLA18NM, UTLA18CD, UTLA18NMField Types - Text, Text, Text, TextField Lengths - 9, 28, 9, 28NB:  File amended to include correct UTLA for London Boroughs and Metropolitan districtsREST URL of Feature Access Service – https://services1.arcgis.com/ESMARspQHYMw9BZ9/arcgis/rest/services/LTLA18_UTLA18_EW_LUv2_5d94ed13335b492bb3f8e9b78cffb8ca/FeatureServer