Most of London's hybrid buses can be recognised by the green leaf motif over
their traditional red livery, usually with a lack of the operator's
corporate colour details.

Optare (OPE) Versa, Alexander Dennis (ADL) Enviro400 double deck and
Wrightbus Gemini 2 Hybrid Electric Vehicle (HEV) are all in advanced stages
of development and evaluation.

Martin G. Layton. ..