map of railways in the vicinity of South Ruislip (shown here as
Northolt Junction) The
GWR/GCR Joint line to
High Wycombe carried services from both
Paddington and
Marylebone. They met at Northolt Junction, situated slightly to the east of the station, from where four tracks ran westwards to
Ruislip Gardens and
West Ruislip; there the route shrank to two tracks only. Opened on 1 May 1908 and originally known as
Northolt Junction, the station became
South Ruislip & Northolt Junction from September 1932 and received its present name on 30 June 1947. The station was designed by
Brian Lewis and
F.F.C. Curtis and first served by Central line trains on 21 November 1948 when the Central line extension from London towards West Ruislip was completed after being delayed by
World War II. The rounded booking hall was not completed until 1960. The concrete, glass and granite chip
frieze in the booking hall is one of the earliest public works by glass artist,
Henry Haig. In late 1973 and early 1974 the track layout was simplified and the manual signal box was removed in early 1990, along with other manual signal boxes on this line, and its function replaced by colour light signalling and power operated points, both controlled from Marylebone. The track alignments were improved to allow higher speed running at the junction for the services from Marylebone, and the pointwork which had allowed trains from Paddington to call at the westbound Chiltern station platform was removed. All eastbound services were moved to the former through road; the eastbound road, which had formerly extended from the platform road at
West Ruislip, was closed and lifted, and the eastbound platform widened. The alignment of the turnout towards Marylebone was improved to allow higher-speed running. Fragments of the old trackwork can still be seen to the north of the line at this point. The trackwork at this station has been upgraded and now permits higher speed running up to . The station was transferred from the
Western Region of British Rail to the
London Midland Region on 24 March 1974. ==The station in the 21st century==