As Johnny and Dave are escaping through the skylight after the robbery, a rope in the shape of a noose can be seen hanging from the ceiling. The rope is for opening and closing the skylight.
The lorry that brings Johnny into town is an Austin Loadstar, which was produced 1949-56.
It's impossible to see how Diana Dors's shorts in the rooftop scenes got past the censor.
There aren't any strangers treading softly - or otherwise.