Alexander Dennis в хронологічному порядку

Diesel-electric hybrid version of the Enviro400.

Hybrid-electric powered version of Enviro200.

Alexander Dennis released a facelifted version of the first generation Enviro400 at Coach & Bus Live in 2009, 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.

The facelifted first generation Enviro400 was sold alongside the original first generation Enviro400 until 2015, when both were discontinued in favour of the second generation Enviro400 MMC and Enviro400H City.

In 2009, the second generation Enviro200 received a facelift in order to allow the type to comply with European Community Whole Vehicle Type Approval (ECWVTA) regulations. Some of the major external changes included the introduction of white LED daytime running lights below the headlights, the relocation of the offside emergency door, redesigned front and rear bumpers and the introduction of several new Enviro200 lengths.