Continuity mistake: When Lizzie and Peter escape the Slazenger party and Peter starts to drive, there is no traffic behind them. But when Lizzie kisses him, distracting him from the road, there is suddenly a big red bus behind the car.
Continuity mistake: When Lizzie's father comes looking for her, he walks up two flights of stairs to get to Peter's door. When Peter opens the door, you can see the number 4 on the door. (00:43:10 - 00:45:30)