Episode #2.8 - S2-E8
Continuity mistake: Mr Mitchell and Carol are in the back seat of the police car looking for Trisha, and when they see her walking home alone they stop to pick her up. In the following scenes of the police car speeding through the streets you can see that Trisha is not in the car, only Carol and Mitchell are in the back seat, but when the police car stops to arrest the man who is following Cathy, Trisha is there again.
Episode #2.8 - S2-E8
Continuity mistake: When Cathy calls out to Gary walking down the road outside the school there is a parked car next to him, but when the angle changes it has gone and a motorbike has appeared there.
Episode #2.8 - S2-E8
Continuity mistake: When Carol meets Trisha at home time at the school's main entrance, behind them you can see two cars parked in front of the school - a black Humber facing the school and a red Vauxhall Victor. When the shot changes to Cathy standing outside the school's front gate you can see the red Victor has gone, the Humber is now parked in the same place but facing away from the school, and a white VW camper has appeared next to it.
Episode #2.8 - S2-E8
Continuity mistake: When Mr. Mitchell is comforting Cathy after the police have arrested the man who was following her, a row of parked cars that were parked behind them have disappeared.