London operator Metroline was the first company to order the Enviro400 , with the first of 28 entering service in January 2006 . One dual door demonstrator , named " Spirit of London " , was delivered to Stagecoach London to replace the Dennis Trident destroyed during 7 July 2005 London bombings and a single door demonstrator was delivered to the then Travel West Midlands for evaluation . Both prototypes were exhibited at Coach & Bus Live 2005 in the National Exhibition Centre in Birmingham , UK and then entered service in January 2006
7 July 2005 London bombings
7 July 2005 London bombings
Alexander Dennis Enviro400