The Alexander Dennis Enviro400H City
is a diesel-electric hybrid bus with bodywork feature design cues based on the
Wrightbus New Routemaster, a 3 door 2 staircase hybrid bus. On the engineering
side it has a Cummins four-cylinder, 4.5 litre iSBe engine; BAE Systems’
HybriDrive technology and the latest generation of Lithium-ion batteries.
Currently the buses are on London Buses
route 78 which goes from Nunhead to Shoreditch via Peckham and Tower Bridge and
is operated by Arriva from Ash Grove (AE) Garage.