The linking of the GN&SR and B&PCR routes at Holborn meant that the section of the GN&SR south of Holborn became a branch from the main route. The UERL began constructing the main route in July 1902. Progress was rapid, so that it was largely complete by the Autumn of 1906. Construction of the branch was delayed while the London County Council carried out slum clearances to construct its new road Kingsway and the tramway subway running beneath it. Although the station was constructed where the GNP&BR's tunnels crossed those of the Central London Railway (CLR, now the Central line) running under High Holborn, no interchange between the two lines was made as the CLR's nearest station, British Museum, was 250 metres (820 ft) to the west. The new Central line platforms came into use on 25 September 1933 replacing those of British Museum, which had closed the day before. As part of the modernisation the station was renamed Holborn (Kingsway) on 22 May 1933.
The area's first mention is in a charter of Westminster Abbey, by King Edgar, dated to 959. This mentions "the old wooden church of St Andrew" (St Andrew, Holborn). The name Holborn may be derived from the Middle English "hol" for hollow, and bourne, a brook, referring to the River Fleet as it ran through a steep valley to the east. In the 18th century, Holborn was the location of the infamous Mother Clap's molly house but in the modern era High Holborn has become a centre for entertainment venues to suit more general tastes: 22 inns or taverns were recorded in the 1860s and the Holborn Empire, originally Weston's Music Hall, stood between 1857 and 1960, when it was pulled down after structural damage sustained in the Blitz. The theatre premièred the first full-length feature film in 1914, The World, the Flesh and the Devil, a 50-minute melodrama filmed in Kinemacolour. The station is in London fare zone 1. Holborn is the only interchange between these lines. Train frequencies vary throughout the day, but generally Central line trains operate every 2–6 minutes from approximately 05:53 to 00:30 westbound and 05:51 to 00:33 eastbound. The station has cash machines, Euro cash machines, escalators, wi-fi and payphones.
Connections: Piccadilly Line. London Buses routes 1, 8, 19, 25, 38, 55, 59, 68, 91, 168, 171, 188, 242, 243, 341, 521 and express route X68 and night routes N1, N8, N19, N35, N38, N41, N55, N68, N91, N98, N171 and N207 serve the station.