During 1860–1861 John Chester Craven, the Locomotive Superintendent of the London Brighton and South Coast Railway (LB&SCR) began the removal of a large chalk hill to the north of the station, which had been dumped during the excavation of the main line. The space created was used to accommodate a new much enlarged motive power depot in 1861, replacing the two existing facilities. During the early 1930s, following the electrification of the lines the steam motive power depot was rebuilt and reduced in size. It was closed 15 June 1961, but remained in use for stabling steam locomotives until 1964, and was demolished in 1966.