Forest Gate is a district in the London Borough of Newham, East London, England. It is located 7 miles northeast of Charing Cross. The area's …Forest Gate is a district in the London Borough of Newham, East London, England. It is located 7 miles northeast of Charing Cross. The area's name relates to its position adjacent to Wanstead Flats, the southernmost part of Epping Forest. The town was historically part of the parish of West Ham in the hundred of Becontree in Essex. Since 1965, Forest Gate has been part of the London Borough of Newham, a local government district of Greater London. The town forms the majority of the London E7 postcode district.