Released in the same year as the Marx Brothers movie of the same name; this bonkers British screwball comedy concerns a wealthy socialite who can't stop hiccupping, and the efforts to help her. It opens with a very dark view of two RT family buses followed by two STLs at Piccadilly Circus:
More interesting (and symptomatic of the bizarre goings-on) is an extended sequence from the 1929 silent Would You Believe It! starring Walter Forde, which includes a passing AEC NS:
THere's also this small bus:
Watching this movie is now the only way you'll get to see the footage from Would You Believe It!