Other mistake: During the hold up when Medhurst is sprung from the police van, the breakdown truck used to pull the doors of the van reverses towards the police van twice after releasing the chains off the doors before driving away, and the camera lights are reflected in the side of the white getaway car.
Continuity mistake: When Regan arrives at the block of flats to speak to Biggleswade's parents, the squad car parks between a blue Ford Cortina and a white Fiat 128 parked a distance behind. In the next shot from the flats walkway looking down the white Fiat is parked right behind the squad car.
Continuity mistake: In the final scene Regan hails a taxi as it pulls in the taxi is passed by a green Jaguar and a yellow Ford Transit. When the angle changes, these two vehicles should pass by, but they don't. Then when the taxi turns round and drives off, the vehicles in front of it should have been seen in the previous angle but they weren't.
Continuity mistake: In the yard behind the furniture shop when Regan and Carter are nearly crushed by the reversing van they escape by climbing up some old cabinets and then jumping on the van roof. Regan then jumps down on the bonnet before banging on the windscreen and having a go at the driver. Carter has disappeared when he should be visible on the van roof. Then when the Irish man comes out of the shop Carter has reappeared, climbing down from the roof to the bonnet of the van, also the two stunt doubles have darker hair than John Thaw and Dennis Waterman.