After the truck is wrecked there's a shot of Mike (Joe Robinson) in a jacket he goes to help his wife and his jacket's gone. He then goes to get his wife's case and he's got his jacket back on.
When the driver jumps from the flat bed truck before it goes off the road there is no door on the driver's side. And when Mike and Paula jump from the rear of the flat bed, the shot of the left side shows there is no one in the cab. The top of the steering wheel can be seen, but no one holding it.
The main characters are given a ride in a Land Rover. Which is right-hand drive, not impossible. But also has a UK format number plate.