For Transport for London, they aimed to comply earlier with the last non-wheelchair accessible buses withdrawn in June 2008 with two exemptions - the heritage routes.

[4] One of the two routes, awarded to Stagecoach London, was for services between Trafalgar Square and Tower Hill, covering the most touristy section of route 15 taking in the Tower of London, Monument, St Paul's Cathedral and Trafalgar Square.

In April 2008, one of the buses was painted in a special Indian Red and Silver livery, to promote Bow Garage's Centenary.

The buses operated with conductors collecting fares, in cash (until July 2014, when they went cashless along with the rest of the London bus network) or by Oyster card.

[9][10][11] In October 2023, new heritage route T15 started operating daily from Tower Gateway to Charing Cross and on across the river to Waterloo, by Transpora Group.