to the South West Main Line at Woking. The Sutton and Mole Valley Lines link , , , to Waterloo via or London Victoria via . The Brighton Main Line calls at and before reaching either London Bridge or London Victoria. is on the east–west North Downs Line. Consequently, the towns Staines, Woking, Guildford, Walton-on-Thames, Epsom and Ewell and Reigate and Redhill, statistically the largest examples, are established rapid-transit commuter towns for Central London. The above routes have had a stimulative effect. The relative development of Surrey at the time of the Beeching cuts led to today's retention of numerous other commuter routes except the Cranleigh Line, all with direct services to London, including: Chertsey Line linking the first two of the above national routes via and New Guildford Line via and from Hampton Court Branch Line to via from Surbiton Branch Line via Sunbury Ascot to Guildford Line via , , into Hampshire via Aldershot and back into Surrey to serve , and . Alton Line calls at the far southwest Surrey town, . Epsom Downs Branch from Sutton and then Belmont in Greater London to and . Tattenham Corner Branch Line calls at , and . Oxted Line calls at and . Redhill to Tonbridge Line serves and . The only diesel route is the east–west North Downs Line, which runs from Reading via Guildford, , and Redhill. The major stations in the county are Guildford (8.0 million passengers), Woking (7.4 million passengers), Epsom (3.6 million passengers), Redhill (3.6 million passengers) and Staines (2.9 million passengers). Air Both Heathrow (in the London Borough of Hillingdon) and Gatwick (in Crawley Borough, West Sussex) have a perimeter road in Surrey. First Group operates a RailAir coach service from Guildford and Woking to Heathrow Airport and there are early-until-late buses to nearby Surrey towns. Fairoaks Airport on the edge of Chobham and Ottershaw is from Woking town centre and operates as a private airfield with two training schools and is home to other aviation businesses. Redhill Aerodrome is also in Surrey. Education The UK has a comprehensive, state-funded education system, accordingly Surrey has 37 state secondary schools, 17 Academies, 7 sixth form colleges and 55 state primaries. The county has 41 independent schools, including Charterhouse (one of the nine independent schools mentioned in the Public Schools Act 1868) and the Royal Grammar School, Guildford. More than half the state secondary schools