Hook is a suburban area in south west London, England. It forms part of the Royal Borough of Kingston upon Thames and is located 12 miles (19.3 km) south west of Charing Cross. Neighbouring settlements are Hinchley Wood, Long Ditton, Surbiton, Tolworth and Chessington. An RAF barrage balloon depot opened in Hook c. 1938 and was later known as RAF Chessington, latterly used as a hospital until demolished and redeveloped for housing in the 1990s. Hook forms part of the Chessington post town.