Bank-Monument station

Bank and Monument are interlinked London Underground and Docklands Light Railway stations that form a public transport complex spanning the length of King William Street in the City of London. Bank station, named after the Bank of England, opened in 1900 and is served by the Central, Northern and Waterloo and City lines, and the Docklands Light Railway. Monument station, named after the Monument to the Great Fire of London, opened in 1884 and is served by the District and Circle lines. The stations have been linked as an interchange since 1933. The station complex is the eighth busiest on the London Underground network and is in London fare zone 1.

Metropolitan Inner Circle Completion Railway, 1884
The Metropolitan Railway (MR) and Metropolitan District Railway (MDR) had, by 1876, built most of the Inner Circle (now the Circle line), reaching Aldgate and Mansion House respectively. The companies were in dispute over the completion of the route as the MDR was struggling financially and the MR was concerned that completion would affect its revenues through increased competition from the MDR in the City area. City financiers keen to see the line completed, established the Metropolitan Inner Circle Completion Railway in 1874 to link Mansion House to Aldgate. Forced into action, the MR bought out the company and it and the MDR began construction of the final section of the Inner Circle in 1879.

The station at Monument opened with the name "Eastcheap" on 6 October 1884 and was renamed "The Monument" on 1 November 1884. Initially, trains from both companies served the station on the Inner Circle service but other operational patterns have been used. The Inner Circle service achieved a separate identity as the Circle line in 1949 although its trains were still provided by the District or Metropolitan Lines.

Waterloo & City Railway, 1898
The Waterloo & City Railway was built by the London and South Western Railway (L&SWR) to link its terminus at Waterloo to the City. The station, with platforms under Queen Victoria Street and close to Mansion House, opened on 8 August 1898 as "City".

The sloping passages to the platforms were later provided with one of the few sets of moving walkways on the whole underground system. Advertising at the Waterloo & City station often takes the form of large painted murals on the walls and ceilings of the sloped exits, forming one of the largest advertisements on the underground. The Waterloo and City line platforms were renamed "Bank" on 28 October 1940.

City & South London Railway, 1900
The first station to be known as Bank opened on 25 February 1900 when the City & South London Railway (C&SLR, now part of the Northern line) opened its extension from Borough to Moorgate. The earlier terminus of the line, King William Street, on a different tunnel alignment was closed at the same time.

The C&SLR had obtained permission to demolish the 18th century church of St Mary Woolnoth on the corner of Lombard Street and build a station (originally proposed to be "Lombard Street") on the site. After public protest, the company changed its plans to build only a sub-surface ticket hall and lift entrance in the crypt of the church. This necessitated moving the bodies elsewhere, strengthening the crypt with a steel framework and underpinning the church's foundations. Unusually for stations later converted to escalators, the original lift access from the ticket hall is still in use.

Central London Railway, 1900
The opening of the eastern terminus of the Central London Railway (CLR, now the Central line) at Bank followed on 30 July 1900.

As with the C&SLR, the high cost of property in the City, coupled with the presence of the Royal Exchange, the Bank of England, and Mansion House, meant that the station had to be built entirely underground. Permission was granted by the City of London Corporation for the station to be sited beneath the busy junction of roads meeting at this point on condition that public subways were provided to act as pedestrian road crossings. To avoid undermining the road above, the station's lifts were installed in separate lift shafts rather than paired two-per-shaft as usual.

To avoid wayleave payments to property owners and to lessen possible claims for damage during construction and operation, the CLR tunnels were directly under public streets. This caused the platforms under Threadneedle Street and Poultry to be so curved that one end of the platform cannot be seen from the other. East of Bank station the Central line tunnels have sharp curves to avoid the vaults of the Bank of England itself.

Due to the close proximity of the CLR, W&CR and C&SLR stations, and the non-competing directions of their services, their ticket halls were soon connected, but connection between the CLR and C&SLR platforms were made only when escalators were installed in the 1920s.

Monument link, 1933
The southern end of the C&SLR (by then part of the Edgware-Highgate-Morden line) platforms was close to those of Monument station and, on 18 September 1933, a connecting escalator link was opened.

Docklands Light Railway, 1991
The Docklands Light Railway built a tunnelled extension to platforms parallel to (but deeper than) the Northern line platforms which opened on 29 July 1991. The DLR platforms were connected at one end to the Central line and at the other to Monument station. A new link between the Waterloo & City and the Central line was excavated which uncovered part of one of the Greathead tunnelling shields used for the Waterloo and City line. This shield forms part of the new passageway, and passengers pass through when transferring between the two lines.

Notable events
On 11 January 1941, during The Blitz, 57 people were killed and 69 people were injured when a German bomb hit the Central line ticket hall. The crater, measuring 120 x, was covered with a Bailey Bridge for the traffic to pass over. The station itself was closed for two months.

On 7 September 2003, Bank station was used for a disaster training exercise, billed as "the most realistic live disaster exercise of its kind". The event, lasting several hours and involving about 500 police, fire, ambulance and London Underground personnel, was intended to prepare the emergency services for mass decontamination in the event of a chemical, biological, radiological or nuclear attack.

Bus connections
London Buses routes 8, 11, 15, 21, 23, 25, 26, 40, 43, 76, 133, 141, 242 and 388 and night bus routes N8, N11, N21, N26, N76, N133, N550 and N551 serve the station.

Future developments
The original CLR station had lifts direct to the platforms, but when escalators later cut through the shafts, access for the mobility impaired was lost. The only parts of the station fully accessible are the DLR platforms with lifts from the street (again using part of St. Mary Woolnoth - the rectory).

Bank is also one of the most congested stations at peak times on the Underground and so Transport for London (TfL) are transforming it significantly, removing some bottlenecks, and improving mobility-impaired access.

The stations 15 escalators are being replaced or refurbished with a one-way system in operation in parts of the station. As yet, no completion date for the escalator refurbishment works has been released for the information of passengers who use the station.