"marc" wrote

The had the same attitude to the "Nissan 30 MPH " road safety ad which
showed a Nissan with obviously disconected rear brakes

Sigh!

involved in an
accident at 30 mph. I think there seems to be an attitude of "It's a
government advert, it can't be wrong"

Obviously the film makers should have anticipated these complaints and
broken the car to avoid them.

Car manufacturers pare their costs to the bone and they wouldn't fit a
pressure regulator on the rear brake without any intention of using it to
regulate the pressure.