Thameslink in the context of Orpington railway station

The Cambridge line is a railway line in the East of England; it connects the East Coast Main Line at Hitchin to the West Anglia Main Line at Cambridge. The line is owned by Network Rail and is 23 miles 15 chains (23.19 miles, 37.32 km) in length, serving nine stations. Train services are operated by Thameslink and Great Northern.

Originally opened in 1851, the Royston and Hitchin Railway built a route between Hitchin and Shepreth. There, it met the Shepreth Branch Railway, and the two were joined in 1862 to form the modern route. A station at Letchworth was added in 1905 in conjunction with its opening as the world's first garden city. However, the line fell into decline throughout the mid 1900s, and Harston station was closed as part of the Beeching Axe in 1963.

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 Tube map (sometimes called the London Underground map) is a schematic transport map of the lines, stations and services of the London Underground, known colloquially as "the Tube", hence the map's name. The first schematic Tube map was designed by Harry Beck in 1931. Since then, it has been expanded to include more of London's public transport systems, including the Docklands Light Railway, London Overground, the Elizabeth line, Tramlink, the London Cable Car and Thameslink.

As a schematic diagram, it shows not the geographic locations but the relative positions of the stations, lines, the stations' connective relations and fare zones. The basic design concepts have been widely adopted for other such maps around the world and for maps of other sorts of transport networks and even conceptual schematics.

The Brighton Main Line is a railway line in southern England linking London to Brighton. It starts at two termini in the capital, London Victoria and London Bridge, and the branches from each meet at East Croydon, from where the route continues southwards via Gatwick Airport to the coast. The line serves the suburbs of South London, as well as the towns of Redhill, Horley, Crawley, Haywards Heath and Burgess Hill.

The distance from the London termini to Brighton is around 50 mi (80 km) and the fastest end-to-end journey time is about an hour. A variety of passenger services runs on the line, including limited-stop airport expresses, semi-fast regional and outer-suburban trains, and shorter-distance commuter services. These are operated by Govia Thameslink Railway (Gatwick Express, Southern and Thameslink), Transport for London (London Overground) and Great Western Railway.

Moorgate (/ˈmʊərɡeɪt/) is a central London railway terminus and connected London Underground station on Moorgate in the City of London. Main line railway services for Hertford North, Welwyn Garden City and Stevenage are operated by Great Northern, while the London Underground station is served by the Circle, Hammersmith & City, Metropolitan and Northern lines. It is in London fare zone 1.

The station was opened as Moorgate Street in 1865 by the Metropolitan Railway. In 1900, the City & South London Railway added the station to its network, and the Great Northern & City Railway began serving the station in 1904. In 1975, the Northern City Line platforms were the site of the Moorgate tube crash – at the time, the worst peacetime accident in the history of the London Underground – in which 43 people were killed. Thameslink branch services were withdrawn in the early 21st century, and a new ticket hall was built connected to the newly opened Elizabeth line at Liverpool Street in 2021, with through access to the rest of Liverpool Street Underground station.

Govia Thameslink Railway (GTR) is a British train operating company that operates the TSGN rail franchise. Within the franchise, GTR runs trains under the sub-brands: Thameslink, Great Northern, Southern, and Gatwick Express. GTR is a subsidiary of Govia, which is itself a joint venture between the British Go-Ahead Group (65%) and French company Keolis (35%).

The franchise was awarded, after repeated delays, to Govia Thameslink Railway on 23 May 2014. On 14 September 2014, GTR took over operations for the prior franchisee First Capital Connect; during July 2015, both Southern and Gatwick Express operations were integrated into GTR. This change made it the largest rail franchise in terms of passengers, staff and fleet in the UK. The franchise has an unusual structure involving a management contract that sees all fare revenues going straight to the Department for Transport (DfT), which in turn pays GTR fixed amounts that add up to £8.9 billion across its first seven years of operation.

Letchworth Garden City station serves the town of Letchworth in Hertfordshire, England. The station is on the Cambridge Line 34 miles 50 chains (55.7 km) north of London King's Cross, and is a stop for services between King's Cross and Cambridge. Trains which serve the station are operated by Great Northern and Thameslink.