Middlesex was formerly part of the Kingdom of Essex It was recorded in the Domesday Book as being divided into the
six hundreds of Edmonton, Elthorne, Gore, Hounslow(Isleworth in all later records), Ossulstone and Spelthorne.
In April 1965, nearly all of Middlesex became part of Greater London, under the control of the Greater London Council, and formed the new outer London boroughs of Barnet(part only), Brent, Ealing, Enfield, Haringey, Harrow,
Hillingdon, Hounslow and Richmond upon Thames part only.