Developed in the late 1970s as a wholly-British competitor to British Leyland's Titan, the Metrobus immediately gained success, not only with London Transport but nationwide. Its fortunes would increase on the back of Leyland's troubles with its own Titan, and by the end of production in 1986 London Transport had 1,440 vehicles in service. The following year would see the Metrobus become the most numerous single bus type in the capital, a distinction it would retain for over a decade. Entering service predominantly in the western half of London, the production run of Metrobuses was supplemented in 1984 by two Mark II examples which it was hoped would continue the type's popularity. While this did not come to pass, the Mark II model took advantage of the uncertain era of deregulation and privatisation to reach the capital in small numbers under Harrow Buses and Ensignbus. When privatisation overtook London Buses Limited at the end of 1994, the Ms were divided between seven new companies - London General, London United, Centrewest, Metroline, MTL London Northern, Cowie Leaside and Cowie South London, and it was only with the advent of low-floor double-deckers at the very end of the decade that large-scale withdrawals of the Metrobus took place. The last Metrobuses on mainstream service officially bowed out on 11 September 2004, with the remaining stragglers on school bus routes being taken out of service on 13 January 2006. After London service, the numerous and versatile M class was taken up by a host of operators across the country as an economical stop-gap for both stage service and touring work, and a considerable number of the distinctive London Transport adaptation can still be found both in Britain and abroad. This complete history of the operator is certain to be extremely popular with all enthusiasts of London Transport, as well as any modellers keen to recreate this important type.