Thameslink is a 24-hour mainline route on the British railway network, running from Bedford, Luton, St Albans City, Peterborough, Welwyn Garden City, London Blackfriars and Cambridge via central London to Sutton, Orpington, Sevenoaks, Rainham, Horsham, Three Bridges, Brighton and East Grinstead. 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 Northern City Line is a commuter railway line in England, which runs from Moorgate station to Finsbury Park in London with services running beyond. It is part of the Great Northern Route services, and operates as the south-eastern branch of the East Coast Main Line (ECML). It is underground from Moorgate to Drayton Park in Highbury, from which point it runs in a cutting until joining the ECML south of Finsbury Park. Its stations span northern inner districts of Greater London southwards to the City of London, the UK's main financial centre. Since December 2015, its service timetable has been extended to run into the late evenings and at weekends, meeting a new franchise commitment for a minimum of six trains per hour until 23:59 on weekdays and four trains per hour at weekends.
Finsbury Park is an intermodal interchange station in North London. It serves a number of National Rail, London Underground and bus services. The station is the third busiest Underground station outside Zone 1, with over 33 million passengers using the station in 2019.
Highbury & Islington is a London Underground and National Rail interchange station in the London Borough of Islington, north London. It is served by the London Underground's Victoria line and the Great Northern's Northern City Line, as well as the London Overground's East and North London Lines.
East Finchley is a London Underground station in East Finchley in the London Borough of Barnet, north London. The station is on the High Barnet branch of the Northern line, between Finchley Central and Highgate stations, and is in Travelcard Zone 3.
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. Services have been transferred to a new station underneath St Pancras.
Highgate is a London Underground station and former railway station in Archway Road, in the London Borough of Haringey in north London. The station takes its name from nearby Highgate Village. It is on the High Barnet branch of the Northern line, between East Finchley and Archway stations, and is in Travelcard Zone 3.
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.
Old Street is a National Rail and London Underground station at the junction of Old Street and City Road in central London, England. The station is on the Bank branch of the Northern line between Angel and Moorgate stations and on the Northern City Line between Moorgate and Essex Road stations. The station is in the London Borough of Islington. It is in Travelcard Zone 1.
Farringdon is a London Underground and connected main line National Rail station in Clerkenwell, London, England, in the London Borough of Islington, just outside the boundary of the City of London. Opened in 1863 as the terminus of the Metropolitan Railway, the world's first underground passenger railway, Farringdon is one of the oldest surviving underground railway stations in the world.
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.
Drayton Park is a National Rail station in Highbury, in the London Borough of Islington. It is on the Northern City Line between Highbury & Islington and Finsbury Park stations, 2 miles 56 chains (4.3 km) down the line from Moorgate; it is in Travelcard Zone 2.
Harringay railway station is in Harringay in the London Borough of Haringey, north London. It is on the Great Northern route that forms part of the East Coast Main Line, 3 miles 32 chains (5.5 km) down the line from London King's Cross, and is situated between Finsbury Park to the south and Hornsey to the north. It opened on 1 May 1885.
Finchley Central is a London Underground station in the Church End area of Finchley, north London. The station is located on the High Barnet branch of the Northern line, between West Finchley and East Finchley stations; it is the junction for the short branch to Mill Hill East. The station is around 7 miles north-northwest of Charing Cross and is in Travelcard Zone 4.
Hornsey railway station is in Hornsey in the London Borough of Haringey, north London. It is on the Great Northern route that forms part of the East Coast Main Line, 4 miles 4 chains (6.5 km) down the line from London King's Cross, and is situated between Harringay to the south and Alexandra Palace to the north.
Alexandra Palace railway station is on the Great Northern Route that forms part of the East Coast Main Line, and takes its name from the nearby Alexandra Palace in the London Borough of Haringey, north London. It is 4 miles 78 chains (8.0 km) down the line from London King's Cross and is situated between Hornsey and either New Southgate on the main line or Bowes Park on the Hertford Loop Line which diverges from the main line just north of Alexandra Palace.
Dalston Junction is an inter-modal rail and bus transport interchange in Dalston, London. It is located at the crossroads of Dalston Lane, Kingsland Road and Balls Pond Road. The station served by London Overground East London line and is in Zone 2. The station is located in a short section of cut and cover tunnel north of the Kingsland Viaduct.
Cranley Gardens railway station was a station in the Muswell Hill area of north London. It was located between Highgate and Muswell Hill stations, at the junction of Muswell Hill Road and Cranley Gardens. Nothing remains of the station today and its site is now occupied by housing and a school. In the 1930s, plans were made to electrify the line and transfer the mainline service to London Underground's Northern line, but these were abandoned after the Second World War. The station closed for passengers in 1954 and for goods in 1957.
Lothbury was an authorised underground railway station planned by the Great Northern & City Railway (GN&CR) but never built. It was to be located in Lothbury, in the City of London, the historic nucleus and financial centre of London.
The transport system now known as the London Underground began in 1863 with the Metropolitan Railway, the world's first underground railway. Over the next forty years, the early sub-surface lines reached out from the urban centre of the capital into the surrounding rural margins, leading to the development of new commuter suburbs. At the turn of the nineteenth century, new technology—including electric locomotives and improvements to the tunnelling shield—enabled new companies to construct a series of "tube" lines deeper underground. Initially rivals, the tube railway companies began to co-operate in advertising and through shared branding, eventually consolidating under the single ownership of the Underground Electric Railways Company of London (UERL), with lines stretching across London.
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London transportportal 
