Alexander Dennis Enviro400
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The Alexander Dennis Enviro400 is a twin-axle low-floor double-decker bus that was built by the British bus manufacturer Alexander Dennis between 2005 and 2018. It replaced the Alexander ALX400. In 20
Stagecoach London Enviro400 at Barking in 2025
First generation (left) and second generation (right) Enviro400s of National Express Coventry, photographed in May 2022
The first production Enviro400, Stagecoach 19000 Spirit of London, new in 2005, photographed in 2014
A second generation Enviro400 operated by Arriva Derby in August 2025
Optare Olympus
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The East Lancs Olympus is a double-decker bus built by East Lancs, Optare and Darwen. It could be built as a body available on Alexander Dennis Enviro400, Volvo B9TL or Scania N230UD/N270UD chassis wi
A Reading Buses Olympus, an example bodied by Darwen Group.
A Transdev London East Lancs Olympus on a Scania N UD chassis
A Network Colchester Darwen Olympus on a Scania N230UD chassis
Excelbus' Olympus with the Scania N230UD chassis