Continuity: When David drives to the nearby village to make the phone call he parks his car facing the opposite direction he is to return. After the call and after his encounter with the village folks he returns to his car and drives off without reversing his car. The car was automatically reversed.
Continuity: When Peter is talking to his wife on the phone asking for his mother's account number, Tracey screams from the room and Peter drops the phone in the pond even before he got the account number. But just before David went out to call Tracey's dad, it seemed that Peter had gotten the account number written on a piece of paper.