They can only seize the car if they have a reasonable suspicion that it IS uninsured. If the PNC shows uninsured they will try and verify that with the insurance company. In this case, a secretary dealt with the insurance on Katies behalf, The officers believed that the car was insured, so let her on her way. They do still give producers to 'normal' people as well.
Some of those near misses on the train tracks were very close, the clip, showing what looked like a Corsa, and then, even worse, the bloke who climbed over the barrier and walked across got within a whisker of death. Astonishing