Continuity mistake: The rear view mirror in Bob's car is there in some shots but missing in others.
Continuity mistake: Thelma calls at Terry's flat but gets no reply so reaches into the letter box to pull out the key on a string to open the door with as soon as she opens the door the angle changes to the flat hallway the key is already hanging behind the letter box again without there being enough time to replace the key.
Continuity mistake: When Bob and Terry are driving back up the road to look for Thelma and Christina, the other vehicles on the road change every time the angle changes.
Continuity mistake: As Bob crashes his car into the caravan, you can see that the car is already damaged.