ADL appears to have ceased producing the Plaxton bodied dennis dart in fabour of the E200.
As TfL contracts are renewed, TfL specify new buses [complying with Euro4 emission standard], and the older plaxton bodied darts are
being replaced.
Here is DP9, from Transdev, on route 440, which will be taken over by NCP Challanger using E200s, and will be cut back from Stamford Brook garage to Turnham Green;
and ENL9 from Arriva, on route T31 [a tram feeder route] , which replaced Marshal body darts from First.