This afternoon, Talking Pictures TV showed one of my favourite films, the 1967 Hammer film 'A Challenge for Robin Hood'. I can never watch this without looking out for the motor car passing along the road as Robin Hood attends a fair to rescue Will Scarlet. The scene occurs about 46 mins 48 seconds into the film. I wonder if the makers noticed this at the time, but decided it would be too expensive to reshoot the scene . If this is noticeable on TV, you can imagine how obvious it would be on the silver screen.