Question: What company services Croydon and operated the Thameslink Great Northern franchise?

full_context: Document 1: London Overground: The London Overground (also known as the Overground) is a suburban rail network in the United Kingdom. Established in 2007, it serves a large part of Greater London and parts of Hertfordshire, with 112 stations on several routes. The network forms part of the National Rail network, but under the franchise control and branding of Transport for London (TfL). Operation has been contracted to Arriva Rail London since 13 November 2016.
Document 2: Thameslink, Southern and Great Northern franchise: Thameslink, Southern and Great Northern (TSGN) is a management contract for the provision of passenger services on the Thameslink and Great Northern routes to Bedford , Luton , Peterborough , King's Lynn , Cambridge , London King's Cross , London Moorgate, Sutton, Wimbledon and Brighton, as well as the whole Southern network (including the Gatwick Express) and the jointly operated First Capital Connect Southeastern services (for example the Kentish Town - Sevenoaks via Catford ), which were added to the franchise on 25 July 2015, with the Southern and Gatwick Express brands retained.
Document 3: Thameslink and Great Northern: Thameslink and Great Northern are the brand names used by the Govia Thameslink Railway train operating company on the Thameslink and Great Northern routes of the Thameslink, Southern and Great Northern franchise, previously operated by First Capital Connect.
Document 4: First Capital Connect: First Capital Connect (FCC) was a British train operating company, owned by FirstGroup, that operated the Thameslink Great Northern franchise from April 2006 to September 2014.
Document 5: Southern (Govia Thameslink Railway): Southern is the brand name used by the Govia Thameslink Railway (GTR) train operating company on the Southern routes of the Thameslink, Southern and Great Northern franchise in England. It is a subsidiary of Govia, a joint venture between transport groups Go-Ahead and Keolis, and has operated the South Central rail franchise since August 2001 and the Gatwick Express service since June 2008. In July 2015, the franchisee was subsumed into GTR, but the Southern and Gatwick Express brand identities were retained alongside those of Thameslink and Great Northern.
Document 6: City Car Club: City Car Club, now Enterprise Car Club, is a British car club operator. Established in 2000 and with around 840 vehicles, it is the oldest and one of the largest car clubs operating at a national scale in the country. In April 2015 City Car Club was acquired by Enterprise Rent-A-Car, and was renamed Enterprise Car Club.
Document 7: Centrale tram stop: Centrale tram stop is a stop on the Tramlink service in Croydon town centre, serving the Centrale shopping centre. The tram stop was provided and paid for as part of the development of the shopping centre.
Document 8: Govia Thameslink Railway: Govia Thameslink Railway (GTR) is a train operating company that operates the Thameslink, Southern and Great Northern (TSGN) rail franchise in England. Within the franchise, GTR runs the Thameslink, Great Northern, Southern and Gatwick Express airport services.
Document 9: Virgin Trains East Coast: Virgin Trains East Coast is a train operating company in the United Kingdom that operates the InterCity East Coast franchise on the East Coast Main Line between London, Yorkshire, the North East and Scotland. It commenced operations on 1 March 2015, taking over from East Coast. It is a joint venture between Stagecoach (90%) and Virgin Group (10%).
Document 10: Economy of the London Borough of Croydon: Croydon, located in Greater London, England, has a diverse economy with the service and retail sectors now dominating over the town's historical market status. It is today served well by its extensive rail network centering on East and West Croydon stations, from where London Overground, First Capital Connect and Southern operate to most parts of Greater London, Surrey, Sussex, Hampshire and the East of England. With the A23, M23 and M25 orbital motorway intersecting Croydon to the South East, it is the principal gateway of the motorway network from the East Sussex area of the South Coast. London Gatwick Airport is located to the direct south of the town and has scheduled flights to destinations within Europe, North America and Asia, although has tough competition from the even bigger London Heathrow Airport to the west but has managed to stay the UK's second busiest airport. The town has since 2000 had a tram network which has been highly successful, carrying more than 24 million passengers a year. The network has four lines with destinations including New Addington to Wimbledon, Beckenham to West Croydon, Elmers End to Therapia Lane, and Elmers End to West Croydon. Croydon is one of only five London boroughs not to have any form of London Underground services.
Document 11: Transport in Manchester: The transport infrastructure of Greater Manchester is built up of numerous transport modes and forms an integral part of the structure of Greater Manchester and North West England – the most populated region outside of South East England which had approximately 301 million annual passenger journeys using either buses, planes, trains or trams in 2014. Its position as a national city of commerce, education and cultural importance means the city has one of the largest and most thorough transport infrastructures which is heavily relied upon by its 2.7 million inhabitants in the Greater Manchester conurbation and further afield in the North West region. Public transport comes under the jurisdiction of Transport for Greater Manchester.
Document 12: London Borough of Croydon: The London Borough of Croydon (   ) is a London borough in south London, England and is part of Outer London. It covers an area of 87 km2 and is the largest London borough by population. It is the southernmost borough of London. At its centre is the historic town of Croydon from which the borough takes its name. Croydon is mentioned in Domesday Book, and from a small market town has expanded into one of the most populous areas on the fringe of London. Croydon is the civic centre of the borough. The borough is now one of London's leading business, financial and cultural centres, and its influence in entertainment and the arts contribute to its status as a major metropolitan centre.
Document 13: Gatwick Express: Gatwick Express is a high-frequency rail passenger service between London Victoria, Gatwick Airport, and Brighton in South East England. It is the brand name used by the Govia Thameslink Railway train operating company on the Gatwick Express route of the Thameslink, Southern and Great Northern franchise.
Document 14: Gatwick Airport: Gatwick Airport (also known as London Gatwick) (IATA: LGW, ICAO: EGKK) is a major international airport in south-east England, 29.5 mi south of Central London and 2.7 NM north of Crawley. It is the second-busiest airport by total passenger traffic in the United Kingdom, after London Heathrow. Gatwick is the eighth-busiest airport in Europe. Until 2016, it was the busiest single-use runway airport in the world before being overtaken by Mumbai's Chhatrapati Shivaji International Airport.
Document 15: Network SouthCentral: Network SouthCentral (NSC) was a shadow franchise that existed from 4 February 1994 to 13 October 1996, when Connex South Central took over the running of the franchise. The franchise is now part of the Thameslink, Southern and Great Northern franchise operated by Govia Thameslink Railway under the Southern brand. As with all shadow franchises, Network SouthCentral was a wholly owned subsidiary of the British Railways Board.
ground_truth: First Capital Connect