Miller began his career with the London and North Eastern Railway as an apprentice, working under Sir Nigel Gresley. He rose up the ranks of LNER and continued his career under British Rail after nationalisation. In the New Year Honours list of 1956, he was awarded the MBE; he was at that time the Assistant Motive Power Superintendent of British Railways Eastern region. By the 1960s, when BR was withdrawing steam locomotives and dismantling facilities for them, Miller was one of several people who provided support to Alan Pegler in his attempts to run the preserved LNER Class A3 4472 Flying Scotsman. He was appointed Chief Engineer in 1968. It was in this position that Miller was credited with instigating the development of the InterCity 125, known as the High Speed Train. At the time, BR was focused on developing an electric Advanced Passenger Train, but by 1969 the APT project was significantly behind schedule. As a stop-gap measure, engineers devised plans for a 125-mile-per-hour "High Speed Diesel Train", which Miller submitted to the British Railways Boardat the beginning of 1969; the submission won the endorsement of Sir Henry Johnson, chairman of BRB. The HSDT eventually became the InterCity 125, introduced into service from 1975. Although the HST was intended to fill in for the APT, the APT project was eventually abandoned and the HST remains in regular service as of 2017. Miller retired in 1973, three years before the HST entered service. He died in 1989.
Legacy
In 2008, East Midlands Trains named an HST power car, 43048, "T.C.B. Miller MBE" in his honour. The managing director of EMT, Tim Shoveller, described Miller as "a true giant in the history of the railway". In 2013, the 125 Group, an enthusiast group dedicated to the HST, launched "Project Miller", named in Miller's honour. The project was founded with the intention of bringing the remaining prototype HST power car, number 41001, back to working order after years of static display in the National Railway Museum in York.
