Almost from the outset, overcrowding has been a constant problem, and there have been numerous improvements to the facilities and below-ground arrangements to deal with this. After much discussion between the then two separate operators, a major reconstruction began in 1912. This entailed a new ticket hall, serving both lines, being built in the basement of the Bakerloo station, with the Bakerloo lifts removed and new deep-level escalators opened down to the Bakerloo line level. Access to the CLR was by way of existing deep-level subways. The new works came into use on 9 May 1914 with the CLR lifts still available for passengers. By 1923 even this rearrangement was unable to cope, so a second rebuilding began. This involved a second set of escalators being built directly down to the Central line and the CLR station building becoming exit-only. On 2 October 1928, a third escalator leading to the Bakerloo platforms was opened. Unusually, lifts came back into prominence at an Underground station when, in 1942, a set of high-speed lifts came into use, largely used as an exit route from the Central line platforms directly to the Argyll Street exit building.