The four platforms at Sutton station are numbered 1 to 4 from north to south. Platforms 1 and 2 are on the lines to Wimbledon, Epsom, Leatherhead, Dorking, and Horsham. Platforms 3 and 4 are on the Epsom Downs Line, which becomes single-track about south of the station. Platforms 1 and 3 are used by services from outer termini to Central London. Trains from Central London use platforms 2 and 4. Terminating trains which return to central London generally use platform 4. Platforms 1 and 2 can accommodate 12-coach trains, and were used by the express services to and Portsmouth Harbour until they were diverted in the early 1980s to serve Gatwick Airport. Nowadays all trains calling at Sutton are formed of ten coaches or fewer. At the London end of platform 1, there are the remains of a fifth platform, which was a bay for local services via Mitcham Junction. Two waiting rooms serve the station. One has its own cafe; the other has a Starbucks kiosk adjacent to it. An M&S Food to Go shop sits adjacent to the concourse within the station building. Three lifts serve all platforms – one each for platforms one, two/three and four. The installation of a side entrance serving the Quadrant was completed in summer 2014.
Wimbledon branch
Parliamentary approval for a line from Wimbledon to Sutton had been obtained by the Wimbledon and Sutton Railway in 1910, but work had been delayed by the First World War. From the W&SR's inception, the District Railway was a shareholder of the company and had rights to run trains over the line when built. In the 1920s, the Underground Electric Railways Company of London planned, through its ownership of the DR, to use part of the route for an extension of the City and South London Railway to Sutton. The SR objected and an agreement was reached that enabled the C&SLR to extend as far as Morden in exchange for the UERL giving up its rights over the W&SR route. The SR subsequently built the line, one of the last to be built in the London area. In both the 1910 and 1920s proposals, the next station towards Wimbledon was to be Cheam on Cheam Road, but the SR dropped this station and replaced it with West Sutton station. The line opened on 5 January 1930 when full services on the line were extended from South Merton.
Services
All services at Sutton are operated by Govia Thameslink Railway, under the Southern and Thameslink brands. Southern operates semi-fast and stopping services to two London terminals, London Victoria, via Mitcham Junction or West Croydon and also to London Bridge where there are semi-fast trains via Norwood Junction. In peak hours, trains also run via Tulse Hill. Southbound services run to Epsom Downs, Epsom, Dorking and Horsham. In peak hours, there are trains to Guildford. Thameslink operates four services per hour to St. Albans, two per hour via each of Wimbledon or Tulse Hill.
Connections
routes 80, 164, 280, 470, S1, S3 and S4, night route N44 and non-TFL route 420 serve the station.
