This article explores the development of various proposed successors to the AEC Routemaster throughout the 1980s, 1990s, and 2000s, before the Conservative Party candidate Boris Johnson proposed the New Routemaster during his 2008 London Mayoral Election.
XRM (Experimental Routemaster)
The front-entrance AEC Routemaster’s (FRM1) launch in December 1966 was met with a sense of pessimism. It was quickly seen as outdated, even before it entered production, and there were growing arguments against London Transport (LT) continuing to design its own vehicles. The introduction of the New Bus Grant scheme, which provided generous subsidies for off-the-shelf vehicles, further weakened the case for bespoke bus designs. This shift towards ready-made models led to the failure of several new bus types, such as the Merlins, Swifts, and Fleetlines, which were plagued by high maintenance costs. Despite this, there remained a strong belief that only London Transport could design buses suited to the city's needs, which resulted in a bias against new models before they had been tested.



