(1966, Tony Kendall)

Roger Thiedeman advises “there is one scene, at the start of the movie when the actors' credits are on-screen, in which an ex London Transport AEC RT of the Ceylon Transport Board (CTB) is seen going about its 'bus'-iness on a crowded Colombo street amidst the cacophony and confusion of a Buddhist religious procession (perahera).”
Roger provided these screencaps; the quality of the the DVD they're taken from is not good!