South Harrow is a London Underground station on the Uxbridge branch of the Piccadilly line. It is between Rayners Lane and Sudbury Hill stations. It is located on Northolt Road (A312). The station is in Travelcard Zone 5. There are several bus stands outside the station as well as overnight train stabling sidings. History South Harrow station was opened on 28 June 1903 by the District Railway (DR, now the District line) as the terminus of its new extension from Park Royal & Twyford Abbey. This new extension was, together with the existing tracks back to Acton Town, the first section of the Underground's surface lines to be electrified and operate electric instead of steam trains. The Deep level tube lines open at that time (City & South London Railway, Waterloo & City Railway and Central London Railway) had been electrically powered from the start. On 1 March 1910, the DR was extended north to meet the Metropolitan Railway (MR, now the Metropolitan line) tracks at Rayners Lane and services commenced over the MR's tracks to Uxbridge. North of the station the line crosses the Roxeth Marsh; the viaduct over it between South Harrow and Rayners Lane was an engineering feat of the time. On 4 July 1932, the Piccadilly line was extended to run west of its original terminus at Hammersmith sharing the route with the District line to Ealing Common. From Ealing Common to South Harrow, the District line was replaced by the Piccadilly line. From South Harrow north, an isolated District line service continued to operate to Uxbridge until 22 October 1933 when the Piccadilly line took over the service to Uxbridge. The original station building is located approximately 170m south of the existing station and can be accessed from South Hill Avenue. It is similar to the building still in use at North Ealing and remains, adjacent to the eastbound platform, in the car park on the north side of the tracks. Today it is used by London Underground as office space for drivers before and after stabling trains in the sidings and driver shift changes. On 5 July 1935, a new station was opened accessed from Northolt Road. The new station building was designed by Charles Holden as a graduated structure stepping up on each side to the platforms of the high level tracks. The brick walls and bands of horizontal glazing are capped with