Gah, this is no PIF (Public Information Film) - in the 1970's, they would have filmed the driver being gobbled up by a paedophile dinosaur. In a polyester suit.
Now this is how you do a PIF:
http://www.youtube.com/watch?v=r7OXZrUEDTQ
PS EVERYONE looked like that in the late 1970s in England.