In order to temporarily disable Lauren's car, Lars' handler disconnects an ignition wire from the distributor in the engine compartment, which keeps her car from starting. However, he had only removed one of the four spark plug wires, not the central ignition wire, which would not have kept the car from starting, it would only have made it run poorly.
The RAF Officer's uniform has medal ribbons from 2003 onwards, including the Iraq medal.
A Volkswagen LT-van is shown. This type was not available until 1976.
The listening device attached to the kitchen table uses a type of battery that had not been invented yet. The text 3,7V 600mAh is clearly visible, which strongly suggests that lithium-ion type of technology was used. That kind of battery would not have been possible in the mid 70's.