The Leyland Titan was a model of double-decker bus produced by the Leyland Truck & Bus division of British Leyland from 1977 until 1984, almost exclusively for London Transport. The Titan was first conceptualised in 1973 as project B15, and was intended as a replacement for the Leyland Atlantean, Daimler Fleetline and Bristol VRT. Following the success of the single-deck Leyland National, it was decided from the outset that the vehicle would be very standardised, and of integral construction. This allowed more flexibility in the location of mechanical components, and allowed a reduced step height. The move away from body on chassis construction caused concern for the bodybuilders who had already lost market to the Leyland National. Talks regarding licensing agreements were held with Alexander and Northern Counties, both major suppliers to their respective local markets, but no agreements were reached. This, in combination with other factors, led Northern Counties to develop the Foden-NC, and Alexander to develop a close working relationship with Volvo with the Volvo Ailsa B55.

The Titan entered service in 1978 with London Transport, which ordered a total of 1,425 of the model up until 1984. Titan buses operated mainly in the east and south-east of the capital. The model was withdrawn in stages from 1992 with the final bus being taken out of service in 2003. (Full article...)