Alexander Dennis Enviro400 Profile and Models

Alexander Dennis Enviro400

YY14 WFU 5460 on Oxford High Street in October 2014. ©Au Morandarte

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, Dennis Trident (from which the Enviro400 was developed) and Plaxton President. In 2014, the Enviro400 was succeeded by the updated Alexander Dennis Enviro400 MMC and production of the classic Enviro400 ceased in 2018.  The Enviro400 was originally launched as an integral product. Soon after launch, the Enviro400 chassis became available with East Lancs Myllennium Lolyne and Optare Olympus bodywork. Alexander Dennis released the second generation Enviro400 at Euro Bus Expo in 2008, with the main external visual differences being the incorporation of a line of white LED daytime running lights underneath the headlights in the main front light clusters, redesigned front bumpers and the relocation of the offside emergency exit door. The facelift coincided with the introduction of a Euro 5 compliant drivetrain for the Enviro400.

(Information provided via Wikipedia)

Type of Bus

Double Decker


Alexander Dennis

Build Dates

2005 to 2018

Seating Capacity

64 to 90 seats

Floor Type

Low Floor



Areas of Operation

Across the UK

In Service Until