During the bombardment of the British Consulate, there are several continuity errors, including a self-repairing window and blind situated behind the piano. And it cannot be put down to the nature of the film because several errors have been carefully avoided.
During the dinner scene towards the end of the film, a piece of plaster falls from the ceiling onto Lady Ruff Diamond who says, "Oh dear! I seem to have got a little plastered!" Joan Sims ad-libbed this line.