The London Underground 1962 Stock was a type of London Underground tube train built for use on the Central line. They were used on the Central line between 1962 and 1995, with some later being transferred to the Northern line where they were used until 1999. Construction The 1962 Stock was built by Metro-Cammell and the BR Workshops in Derby for use on the Central line. Each unit consisted of four cars; two outer driving motors (DM), an intermediate trailer (T), and an intermediate non-driving motor (NDM), formed DM + T + NDM + DM. A train usually consisted of two units working in multiple forming an eight-car train. Most 1962 stock units were 4 cars long, although an extra 3-car unit was also ordered; this vehicle lacked an NDM carriage and was numbered 1751. This unit was ordered specifically for the Aldwych shuttle until it was given a fourth car in 1989 and entered service on the Central Line. The 1962 Stock was ordered as a matter of urgency to replace the Standard Stock previously used on the Central line. Two fires on Standard Stock units (in 1958 and 1960) resulted in the hospitalisation of dozens of passengers. This experience, plus rapidly increasing numbers of breakdowns, hastened the need to replace these trains (which dated back to the 1920s). The 1962 Stock was ordered from the Birmingham Railway Carriage and Wagon Company (338 DM and 112 NDM) and from the British Railways workshops in Derby (169 T), a total of 619 cars. In 1961, BRCW asked to be relieved of their contract, as they were in financial difficulty, and the order was transferred to Metro-Cammell, and was delivered as a continuation of the 1959 stock. As part of the 1959 Stock contract, Metro-Cammell were requested to construct an extra 57 NDM so that eight car trains of 1959 stock could be temporarily formed, such was the urgency to replace the trains on the Central line. The first 1962 stock train entered service on 12 April 1962, with all trains in service by 17 May 1964. All 1959 stock trains were transferred back to the Piccadilly line, less the 57 NDM of course which remained to be incorporated into the Central line trains, such that all trains operated were 8 cars long, formed DM + T + NDM + DM - DM + T + NDM + DM. The 1962