King's Cross Thameslink is a closed railway station which served the King's Cross area of central London, England, between 1863 and 2007. It is located on Pentonville Road, around east of main line station. At the time of its closure, it was served by Thameslink trains and was managed by First Capital Connect. Services transferred to a new station underneath St Pancras.

The station opened in 1863 as King's Cross Metropolitan. It was one of the initial seven stations on the Metropolitan Railway, London's first underground line, which ran between Paddington and Farringdon. The Metropolitan had been planning for the station since 1851, when King's Cross main line station was constructed, to provide a connection between the Great Western Railway at Paddington and the Great Northern Railway (GNR) out of King's Cross. Within a year of the new station's opening, a pair of tunnels were added, which surfaced on the GNR just north of King's Cross and provided a direct rail connection between the two lines. In 1866, the line was extended east to Moorgate and Snow Hill tunnel was built to join the London, Chatham and Dover Railway (LCDR) City Branch at . In 1868 a second pair of tracks, known as the City Widened Lines, was opened along with a tunnel connection to the Midland Railway near St Pancras station. The route through the station was very busy throughout the remainder of the century, carrying trains from five companies. In 1892, the station was linked to the concourse of King's Cross main line station by a foot tunnel.

The opening of the Piccadilly and Northern underground lines, as well as the growth of trams on the surface streets, led to a sharp reduction of services on the City Widened Lines in the early twentieth century. The Metropolitan line remained popular, however, following electrification of its tracks in 1905–06. Passenger service was reduced to peak hours only during World War I, with no service through the Snow Hill tunnel, as the lines were used heavily for freight and troop movements. The line and station were closed for five months during World War II, following damage in The Blitz. Only the City Widened Lines platforms remained in use when the station reopened in 1941: the Metropolitan line station was moved to a new pair of platforms which had been built at , providing a shorter connection to the Piccadilly and Northern lines. Trains from the East Coast Main Line and Midland Main Line continued to stop at King's Cross Metropolitan. In the 1980s, the City Widened Lines were electrified and the Snow Hill tunnel reopened to passenger traffic as part of the Thameslink programme. The station was renamed, first to King's Cross Midland City and then to its final name, King's Cross Thameslink. Service on the line grew and new destinations were added and, by the 2000s, the station could no longer handle the passenger numbers. A new pair of platforms were built at St Pancras, and King's Cross Thameslink closed in 2007. The station was included in the London station group from the group's inception in 1983 and remained so until its closure.

Name The station was known officially as King's Cross Metropolitan when it opened by the Metropolitan Railway in 1863, although on timetables and maps it was often just called King's Cross or King's Cross (Met.). The Metropolitan line part of the station was renamed King's Cross & St Pancras in 1925 and then to King's Cross St Pancras in 1933, when the Metropolitan Railway was merged with the Underground Electric Railways Company of London to form the London Passenger Transport Board (LPTB). The station was then part of the King's Cross St Pancras underground station complex. The City Widened Lines platforms continued to be signed as King's Cross through to the 1970s. When the station reopened in 1983, following electrification, it was known as King's Cross Midland City and acquired its final name, King's Cross Thameslink, in 1988.

Location King's Cross Thameslink is located in a cutting around east of the main line station. The station's main entrance was on the north side of the station at the western end of Pentonville Road, part of the London Inner Ring Road. This replaced an earlier entrance located on Gray's Inn Road, south of the tracks. The Thameslink platforms were linked directly by stairs and a tunnel to the Victoria and Piccadilly line platforms at King's Cross St Pancras, and via both sets of platforms to the Circle, Hammersmith & City, Metropolitan and Northern lines as well as the main line stations at King's Cross and St Pancras.

History Early history

The area of King's Cross was previously a village known as Battle Bridge, an ancient crossing of the River Fleet. The river flowed along what is now the west side of Pancras Road until it was rerouted underground in 1825. The main line King's Cross station was built in 1851–52 as the London terminus of the Great Northern Railway (GNR), and was the fifth London terminal to be constructed. The station took its name from the King's Cross building, a monument to King George IV that stood in the area and was demolished in 1845. Plans for the station were made in December 1848 under the direction of George Turnbull, resident engineer for constructing the first of the Great Northern Railway out of London.Turnbull, George; Diaries of George Turnbull (Chief Engineer, East Indian Railway Company) held at the Centre of South Asian Studies at Cambridge University, EnglandTurnbull, George; George Turnbull, C.E. Memoir published privately 1893, scanned copy held in the British Library, London on compact disc p. 87 The station opened on 14 October 1852. The first suburban services to and from King's Cross began operating in 1861, initially to Seven Sisters Road station (which was renamed in 1869), and later to and beyond.

King's Cross Metropolitan

The first underground station at King's Cross was planned in 1851, during construction of the main line station. The intention was to connect the Great Western Railway (GWR) at Paddington with the Great Northern Railway (GNR) at King's Cross. The line was opened on 10 January 1863, along with six other stations, as part of the original section of the Metropolitan Railway, which would later become part of the London Underground. King's Cross Metropolitan, the predecessor of King's Cross Thameslink, opened at the same time and was located to the east of the main line station. The line was initially dual gauge, enabling both the GWR's broad gauge trains and other standard gauge stock to run. Later that year a pair of tunnels—the York Road Curve for southbound trains and the Hotel Curve for northbound trains—were built, joining the GNR lines north of the main line station with the Metropolitan's line at King's Cross Metropolitan. The GWR ran the first trains on the line, but relations towards the Metropolitan quickly became strained and the GWR withdrew from the route in August 1863. The Metropolitan was able to continue operating by leasing rolling stock from the GNR, which it brought on to the line through the York Road tunnel. The GNR started routing all its suburban trains through the tunnels to Farringdon Street (now ) station in October. Trains into London stopped at a new platform known as King's Cross York Road to the north-east of the mainline station, and again at the Metropolitan station, while trains out of London stopped at the Metropolitan station, and again at the main line station, by reversing into a platform after exiting the Hotel Curve.

In 1866, the Snow Hill tunnel was opened, joining the Metropolitan Railway at Farringdon Street to the London, Chatham and Dover Railway (LCDR) terminus at Ludgate Hill. This allowed goods and passenger trains to run from the GNR lines south through to and beyond. The lines became very congested, leading to the opening in 1868 of a new pair of lines known as the City Widened Lines; these ran alongside the original tracks from King's Cross through to Moorgate, and allowed GNR and Metropolitan traffic to run along the line simultaneously. The same year the Metropolitan built a pair of tunnels to the Midland Railway tracks north of its new terminus at St Pancras station. This enabled the Midland to begin running a service from through to Moorgate. The Midland tunnels as well as the original York Road and Hotel Curve tunnels from King's Cross main line station were connected to the City Widened Lines, while the link to the original Metropolitan lines was removed. The original Metropolitan tracks became part of the Inner Circle (later known as the Circle line), which ran partly on Metropolitan tracks and partly on District Railway tracks. The line was completed in 1884. Services were provided by both the Metropolitan, which ran the clockwise trains and the District, which ran anticlockwise.

The route through King's Cross Metropolitan remained busy throughout the remainder of the 19th century, with trains from five companies—the Metropolitan, GNR, Midland, LCDR and the South Eastern Railway (SER)—and routes including Victoria to as well as services from north London to and . A service operated from Liverpool to Paris, via the Widened Lines, departing at 08:00 and arriving in Paris by 22:50, having travelled by across the English Channel in a paddle steamer. Trains continued to ascend up the Hotel Curve from the Metropolitan station and reverse into the main line station until 1878, when a new platform was built on the western side of the GNR tracks. This became known as the King's Cross Suburban station, but suffered from several problems including a steep incline and sharp curve, along with a build-up of smoke because of its proximity to the mouth of the tunnel. Congestion was somewhat alleviated when a connection between Finsbury Park and allowed use of the North London Railway tracks to take some of the traffic from the GNR lines into Broad Street station in the City of London rather than down the Metropolitan line. In 1892, the station was linked to the concourse of the main line station by a foot tunnel.

Arrival of the deep tube and relocation of Metropolitan platforms The advent of deep-level tube lines at the turn of the twentieth century caused major changes in the underground network. The Great Northern, Piccadilly & Brompton Railway, later known as the Piccadilly line, opened a station serving King's Cross and St Pancras in 1906, and the City & South London Railway, now part of the Northern line, opened its station the following year. The tube platforms were linked to King's Cross Metropolitan through the same foot tunnel as the main line, making one station complex. The Metropolitan line part of the station was amalgamated in 1933 with the deep-level lines as part of the newly-formed the LPTB. The arrival of the Piccadilly and Northern lines, as well as the growth of trams on the surface streets, led to a sharp reduction of services on the City Widened Lines. The SER, LCDR, and GNR services were withdrawn in 1907, and the Midland and LC&DR joint service in June the following year. The decreased passenger service allowed a growth in freight traffic through the station.

During World War I, the line was used for freight and troop movements with 250,000 tons of freight and 26,047 special troop trains passing through. Passenger service was reduced to four hours per day during morning and evening peak hours from 1915. The Snow Hill tunnel closed to passenger service during the war, and the north–south link was used only by freight in the postwar years. Service on the Circle and Metropolitan line tracks increased over subsequent years, however, following electrification of those tracks in 1905–06.