Continuity mistake: In the final scene when the three squad cars, a Granada, a Triumph and a Cortina, are chasing the villain's Jaguar across the field, the angle changes and the Cortina has disappeared. When the chase changes to a lane the Cortina reappears. (00:46:36 - 00:47:22)
Continuity mistake: During the car chase at the airfield, after the Triumph crashes into the villain's Jaguar, spinning it round, the chase suddenly changes from the airfield to a lane.
Answer: Scripted.