File:Blue Triangle bus T2 (THX 402S), 1978 Leyland Titan B15, 2005 Cobham bus rally.jpg

English: Blue Triangle bus T2 (reg. THX 402S), pictured at the 2005 Cobham bus rally operating the rally shuttle service, route 477, between the rally site at Wisley Airfield and Cobham bus museum.

T2 was the second production example of the Leyland Titan (B15), built in 1978 by the British Leyland subsidiary Park Royal Vehicles in Park Royal, London (later ones were built at Leyland's expanded factory in the Lillyhall Industrial Estate, Workington). As with the vast majority of production, it was delivered new to London Transport as part of the dual-door T-class.

Allocated to Hornchurch garage (code RD), after driver training, aswell as a period of mechanical training at Clapham garage (code CA), T2 entered service at Hornchurch in December 1978. In common with the first 31 London Titans, it was painted in London red, but with white window surrounds for the upper deck (later ones were painted in plain red). T2 was sent for overhaul at Aldenham Works in April 1984.

By May 1986 it had been repainted into the standard plain red LT livery. Surviving into the privatised era and latterly working out of North Street (code NS) garage in Romford and in LBL East London division livery, it passed into the fleet of Stagecoach East London in 1994, receiving their version of allover red livery.

In August 2001 it was bought by Blue Triangle, who restored it to original LT condition and livery and used it on schools, rail replacement and other private hire services (the LT/TfL roundel in the rear route blind display here is probably left over from a tube replacement service).

When Blue Triangle was sold to Go-Ahead in 2007, T2 was retained by The London Bus Company.