The New Routemaster, originally referred to as the New Bus for London and colloquially as the Borismaster or Boris Bus, is a low-floor hybrid diesel–electric double-decker bus operated in London, England. Designed by Heatherwick Studio and manufactured by Wrightbus, it is notable for featuring a "hop-on hop-off" rear open platform similar to the original Routemaster bus design but updated to meet requirements for modern buses to be fully accessible. It first entered service in February 2012 with Arriva London on route 38.
The original AEC Routemaster was used as the standard London bus type, with a rear open platform and crewed by both a driver and conductor. After half a century, it was withdrawn from service at the end of 2005 (except for two heritage routes which operated until 2014 and 2019 respectively), in favour of a fully accessible one-man-operated modern fleet (including articulated buses), none of which featured a rear open platform. The withdrawal of the Routemaster became an issue during the 2008 London mayoral election with Boris Johnson elected mayor with a campaign pledge to introduce a new Routemaster. Following an open design competition in 2008, Wrightbus was awarded the contract to build the bus at the end of 2009, and the final design was announced in May 2010.