Brighton Main Line in the context of "Govia Thameslink Railway"

Clapham Junction (/ˈklæpəm ˈdʒʌŋkʃən/) is a major railway station near St John's Hill in south-west Battersea, in the London Borough of Wandsworth, England. It lies 2 miles 57 chains (2.71 mi; 4.37 km) from London Victoria and 3 miles 74 chains (3.93 mi; 6.32 km) from London Waterloo. Despite its name, Clapham Junction is not in Clapham, a district 1 mile (1.6 km) to the south-east.

A major transport hub, Clapham Junction station is on both the South West Main Line and Brighton Main Line, as well as numerous other routes and branch lines which pass through or diverge from the main lines at this station. It serves as a southern terminus of both the Mildmay and Windrush lines of the London Overground.

Victoria station, also known as London Victoria, is a central London railway terminus and connected London Underground station in Victoria, in the City of Westminster, managed by Network Rail. Named after the nearby Victoria Street, the mainline station is a terminus of the Brighton Main Line to Gatwick Airport and Brighton and the Chatham Main Line to Ramsgate and Dover via Chatham. From the main lines, trains can connect to the Catford Loop Line, the Dartford Loop Line, the Sutton & Mole Valley lines to Dorking and the Oxted line to East Grinstead. Southern operates most commuter and regional services to south London, Sussex and parts of east Surrey and south-east Hampshire while Southeastern operates trains to south-east London and Kent, alongside limited services operated by Thameslink. Gatwick Express trains run direct to Gatwick. The London Underground station is served by three lines: Circle, District and Victoria. On the Circle and District lines, the station is between Sloane Square and St James's Park stations. On the Victoria line, it is between Pimlico and Green Park stations. The area around the station is an important interchange for other forms of transport: a local bus station is in the forecourt and Victoria Coach Station is nearby, which serves national and international coaches.

Victoria was built to serve both the Brighton and Chatham Main Lines, and has always had a "split" feel of being two separate stations. The Brighton station opened in 1860 with the Chatham station following two years later. It replaced a temporary terminus at Pimlico, and construction involved building the Grosvenor Bridge over the River Thames. It became immediately popular as a London terminus, causing delays and requiring upgrades and rebuilding. It was well known for luxury Pullman train services and continental boat-train trips, and became a focal point for soldiers during World War I.

The South West Main Line (SWML) is a 143-mile (230 km) major railway line between Waterloo station in central London and Weymouth on the south coast of England. A predominantly passenger line, it serves many commuter areas including south western suburbs of London and the conurbations based on Southampton and Bournemouth. It runs through the counties of Surrey, Hampshire and Dorset. It forms the core of the network built by the London and South Western Railway, today mostly operated by South Western Railway.

Operating speeds on much of the line are relatively high, with long stretches cleared for up to 100 mph (160 km/h) running. The line has four tracks for most of its length between Waterloo and Worting Junction, south west of Basingstoke; most of the rest is double track. A couple of miles from the Waterloo terminus, the line runs briefly alongside the Brighton Main Line west branch out of London Victoria, including through Clapham Junction.

Redhill (/ˈrɛdhɪl/) is a town in the borough of Reigate and Banstead within the county of Surrey, England. The town, which adjoins the town of Reigate to the west, is due south of Croydon in Greater London, and is part of the London commuter belt. The town is also the post town, entertainment and commercial area of three adjoining communities : Earlswood, Merstham and Whitebushes, as well as of two small rural villages to the east in the Tandridge District, Bletchingley and Nutfield.

The town is situated on the junction of the north–south A23 (London to Brighton) road, and the east–west A25 road which runs from Guildford through to Sevenoaks. It is also on the railway junction, served by Redhill railway station, of the Brighton Main Line, North-Downs line, and Redhill-Tonbridge line.