This is a lookup file between local authority districts and counties, metropolitan counties and Greater London in England as at 1st April 2020. (File Size - 104KB)E10000002 - Buckinghamshire county abolished. E06000060 - Buckinghamshire unitary authority created.(E07000004 - Aylesbury Vale, E07000005 - Chiltern, E07000006 - South Bucks and E07000007 - Wycombe districts abolished)Field Names - LAD20CD, LAD20NM, CTY20CD, CTY20NM, FIDField Types - Text, Text, Text, Text, Field Lengths - 9, 28, 9, 18FID = 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.