(1950, Jack Warner, Jimmy Hanley, Dirk Bogarde)

“This has general London street scenes with buses and trolleybuses, but you can make out in one shot a hired Tilling Bristol K type. (the bus is in soft focus so details cannot be seen)” (thanks Bob Wingrove).
Jon Price identfies ST, STL, RT (roof box and standard), a Green Line AEC Regal coach and a number of trolleybuses as well as the on loan Tilling Bristol K type. Trolleybus scenes are abundant in this film:

The scene in which Tom Riley (Bogarde) shoots PC George Dixon has this trolleybus as a backdrop:

The closing scenes of the film convey the continuity of life in London, and the trolleybuses continue to pass:

Many of the views of buses include trolleybus wires:


</center> In this street scene a 10T10 type Green Line T-class AEC Regal can be seen among the 'deckers: