Westerham is a town as well as civil parish in the Sevenoaks District of Kent, England, located 5 miles (8 kilometres) west of Sevenoaks. It is recorded as early as the 9th century, and also was discussed in the Domesday Book in a Norman type, Oistreham (compare Ouistreham in Normandy, Oistreham in 1086). Ham is Old English for a town or homestead, therefore Westerham means a western homestead. The River Darent flows through the community, and also formerly powered three watermills. Westerham was house to the Black Eagle Brewery, which was taken over by Taylor Walker & Co in the 1950s, becoming part of Ind Coope in 1959 and closing in 1965. Yeast from the brewery was protected at the National Collection of Yeast Societies and also is now used by the existing day Westerham Brewery which was developed in 2004 by Robert Wicks. The brewery produces a series of ales, including Westerham British Bulldog. Westerham was residence to Crayford Engineering, an effective automobile conversion firm, from 1962 to the 1980s, functioning from a workshop at Squerryes Mede.