(1931 (Benita Hume, Peter Hannen, Harold Huth)

An inventor and his new bride are pursued by criminals on their honeymoon. London street scenes include an early rear entrance Green Line T-class AEC Regal:

Most of the other buses seen are roof only, but there is a glimpse of an AEC NS:

Our heroine is followed aboard an open top 'decker (it's a studio shot with back projection), but it's not identifiable: