Continuity mistake: At the end of the movie when Steve and Anna are in the boat going across the harbour, in the background is a Shell petrol station on the shore. The boat is travelling from left to right across the screen, but as the camera shots change from Steve to Anna, or both at once, the Shell sign keeps changing its relative position to the boat.
Other mistake: Near the start of the film Billy Connelly hurts his foot. He can't walk without using a crutch, but not that long after he hurts it he manages to drive without any bother. Would this not be a danger to drivers, and how can he drive so well only a short while after a sharp piece of wood has just gone through his foot?