Thameslink is a 24-hour main-line route in the British railway system, running from Bedford, Luton, St Albans City, Peterborough and Cambridge via central London to Sutton, Orpington, Sevenoaks, Rainham, Horsham, Brighton, East Grinstead, and Littlehampton. The network opened as a through service in 1988, with severe overcrowding by 1998, carrying more than 28,000 passengers in the morning peak. All the services are currently operated by Govia Thameslink Railway.
The Circle line is a spiral-shaped London Underground line, running from Hammersmith in the west to Edgware Road and then looping around central London back to Edgware Road. The railway is below ground in the central section and on the loop east of Paddington. Unlike London's deep-level lines, the Circle line tunnels are just below the surface and are of similar size to those on British main lines. Printed in yellow on the Tube map, the 17-mile (27 km) line serves 36 stations, including most of London's main line termini. Almost all of the route, and all the stations, are shared with one or more of the three other sub-surface lines, namely the District, Hammersmith & City and Metropolitan lines. On the Circle and Hammersmith & City lines combined, over 114 million passenger journeys were recorded in 2011/12.
The Hammersmith & City line is a London Underground line that runs between Hammersmith in west London and Barking in east London. Printed in pink on the Tube map, it serves 29 stations over 15.8 miles (25.5 km). Between Farringdon and Aldgate East it skirts the City of London, the capital's financial heart, hence the line's name. Its tunnels are just below the surface and are a similar size to those on British main lines. Most of the track and all stations are shared with either the District, Circle, or Metropolitan lines. Over 114 million passenger journeys are made each year on the Hammersmith & City and Circle lines.
Paddington, also known as London Paddington, is a Central London railway terminus and London Underground station complex, located on Praed Street in the Paddington area. The site has been the London terminus of services provided by the Great Western Railway and its successors since 1838. Much of the main line station dates from 1854 and was designed by Isambard Kingdom Brunel.
Baker Street is a London Underground station at the junction of Baker Street and the Marylebone Road in the City of Westminster. It is one of the original stations of the Metropolitan Railway (MR), the world's first underground railway, opened on 10 January 1863.
King's Cross Thameslink station is a closed railway station in central London, England. It is located on Pentonville Road, around 250 metres (0.2 mi) east of King's Cross mainline station. At the time of closure, in 2007, it was served by Thameslink trains and managed by First Capital Connect.
Moorgate is a central London railway terminus and connected London Underground station on Moorgate in the City of London. Main line railway services for Hertford, Welwyn Garden City and Stevenage are operated by Great Northern, while the Underground station is served by the Circle, Hammersmith & City, Metropolitan and Northern lines.
West Ham is a London Underground, Docklands Light Railway (DLR) and National Rail intermodal interchange station in West Ham, London, United Kingdom. The station is served by London Underground's District, Hammersmith & City and Jubilee lines, the Stratford International branch of the DLR, and c2c National Rail services.
Edgware Road is a London Underground station on the Circle, District and Hammersmith & City lines, located on the corner of Chapel Street and Cabbell Street, within Travelcard zone 1. A separate station of the same name but served by the Bakerloo line is located about 150 metres away on the opposite side of Marylebone Road.
Euston Square is a London Underground station at the corner of Euston Road and Gower Street, just north of University College London – its main entrance faces the tower of University College Hospital. The multi-interchange Euston station is beyond Euston Square Gardens, which is one street east. The station is between Great Portland Street and King's Cross St Pancras on the Circle, Hammersmith & City and Metropolitan lines in Travelcard Zone 1.
Aldgate is a London Underground station near Aldgate in the City of London. The station is on the Circle line between Tower Hill and Liverpool Street, and is the eastern terminus of the Metropolitan line. It is in Travelcard Zone 1.
Whitechapel is an interchange station in Whitechapel, East London for London Underground, London Overground and Elizabeth line services. The station is located behind a street market of the same name and opposite Tower Hamlets Town Hall. It lies between Aldgate East and Stepney Green stations on the District and Hammersmith & City lines, between Shoreditch High Street and Shadwell stations on the East London Line. To the West of Whitechapel on the Elizabeth Line is Liverpool Street, to the East the line splits with one branch going to Stratford and one to Canary Wharf. It is in Travelcard Zone 2.
Great Portland Street is a London Underground station near Regent's Park. It is between Baker Street and Euston Square on the Hammersmith & City, Circle and Metropolitan lines. Great Portland Street station is listed as a building of National Significance and lies in Travelcard Zone 1.
Barbican is a London Underground station situated near the Barbican Estate, on the edge of the ward of Farringdon Within, in the City of London in Central London. It has been known by various names since its opening in 1865, mostly in reference to the neighbouring ward of Aldersgate.
Stepney Green is a London Underground station located on Mile End Road in Stepney, London, United Kingdom. It is between Whitechapel and Mile End on the District line and the Hammersmith & City line, and is in Travelcard Zone 2.
The London station group is a group of 18 railway stations served by the National Rail network in central London. The group contains all 14 terminal stations in central London, either serving major national services or local commuter routes, and 4 other through-stations that are considered terminals for ticketing purposes. All current stations in the group fall within London fare zone 1. A ticket marked "London Terminals" allows travel to any station in the group via any permitted route, as determined by the National Routeing Guide.
The Thameslink Programme, originally Thameslink 2000, was a £6 billion project in south-east England to upgrade and expand the Thameslink rail network to provide new and longer trains between a wider range of stations to the north and to the south of London. The development facilitated new cross-London journeys, which means that passengers no longer have to change trains in London. Work included platform lengthening, station remodelling, new railway infrastructure, and new rolling stock. The project was originally proposed in 1991 following the successful introduction of the initial Thameslink service in 1988. After many delays, planning permission was granted in 2006 and funding was approved in October 2007. Work started in 2009 and was completed on 18 September 2020, although trains over the new routes began running in 2018.
The Widened Lines is a double-track railway line forming part of the Thameslink route between St Pancras and Farringdon within Central London.
Paddington is a London Underground station served by the Circle and Hammersmith & City lines. It is located adjacent to the north side of Paddington mainline station and has entrances from within the mainline station and from Paddington Basin. The station is between Royal Oak and Edgware Road and is in London Fare Zone 1.
Paddington is a London Underground station served by the Bakerloo, Circle and District lines. It is located on Praed Street to the south of Paddington mainline station and has entrances from Praed Street and from within the mainline station. On the Bakerloo line the station is between Warwick Avenue and Edgware Road and on the Circle and District lines it is between Bayswater and Edgware Road. It is in London Fare Zone 1.
20.14 million [3] 
5.90 million [6] 
London transportportal 
