Metropolitan line (1933–1988) (original) (raw)

London's Metropolitan Railway (MR) amalgamated with other underground railways, tramway companies and bus operators on 1 July 1933, to form the London Passenger Transport Board (LPTB); the MR became the Board's Metropolitan line. Steam locomotives were used north of Rickmansworth until the early 1960s, when they were replaced following the electrification of the tracks to Amersham and the introduction of new electric multiple units. London Transport withdrew its service north of Amersham at this time.