In Taxi Girls, eight hookers go into the bank. None of them is actress Aubrey Nichols. Four of those eight then head into Mr. Brock's office. Cut to inside the office where we see four girls enter for their sex scene and Nichols is now miraculously one of the four, appearing out of nowhere. The same thing happens later in the film during the car-buying scene.
During the scene in which an old woman comes to police station to complain about her stolen purse, the officer's cap is off his head when the camera is behind him and on his head when the camera is in front of him. It is repeated many times during the scene.