42 ADL Dennis Trident Enviro 400 double deckers have been ordered for delivery during the second half of 2008 to meet future possible fleet replacement requirements.

19 ADL dual door Enviro 200 10.1m single deckers are due in Summer 2008 mainly for the new contract for Route 326 (Barnet - Brent Cross). 11 similar 10.7m single door vehicles are due for delivery in the late Spring to upgrade Hertfordshire routes 84 and 242.