line tunnels in 2022. From January until mid May 2022, the Northern line through Bank was closed – this was required to allow the existing line to be connected to the new running tunnels, convert the previous southbound platform to a new passenger concourse, as well as final fit-out and integration works throughout the expanded station complex.On 15 May 2022, the new Northern line southbound platform and concourse was opened, the first part of the station expansion open to the public. On 13 October 2022, new escalators connecting the DLR and the Northern line opened. On 28 October 2022, a moving walkway between the Central and Northern lines was opened. These new connections cut the time taken to interchange between lines, as well as expanding the capacity of the station. On 27 February 2023, the project was completed with the opening of the new Cannon Street entrance, as well as lifts providing step free access to the Northern line and the DLR. The station has 27 escalators, the most of any station on the Underground. Ticket halls and entrances Following the opening of the Cannon Street entrance in 2023, the station complex has sixteen entrances and five ticket halls, the most of any station on the Underground. Bullring (Central line) ticket hall, located underneath Bank Junction. Lombard Street (Northern line) ticket hall, located under Lombard Street. Monument ticket hall, located under Monument Street adjacent to the Monument to the Great Fire of London, serving the District & Circle lines. Walbrook ticket hall, at Bloomberg London, serving the Waterloo & City line. Cannon Street ticket hall, on Cannon Street located just east of St Mary Abchurch. Notable events On 11 January 1941, during the Blitz, 56 people were killed and 69 were seriously injured when a German bomb hit the booking hall, with the blast travelling down the stairs and escalators to the platforms. The crater, measuring , 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, Exercise Osiris, billed as "the most realistic live disaster exercise of its kind". The event, lasting several hours and involving about 500 police, fire brigade, 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