I wonder whether any of the passengers in the Harrow Road area remember travelling on the 662/664 trolleybuses down to Paddington Green. They were virtually silent, certainly from inside, and capable of remarkable acceleration. Funnily enough, the 36 route was home to the diesel bus with (in my experience) the best acceleration, almost too much in fact, the Metropolitan until they were removed to opo routes, the 36 being unassailably crew operated at the time. The 164 strong fleet of Metropolitans, always assigned to SE London garages, weren't flavour of the month with LT. but one has been preserved.
Regarding the Metrodecker, does it have a second door, and isn't the staircase rather too far forward for TfL?