Ok, here's the situation.
DH has an old sports car which doesn't have seat belts fitted - dates from 1963 pre seat belt regulation.
We've never taken the boys in the car (because it hasn't got seat belts or any method of attaching the appropriate child seat). I said to DH/DS tonight that it was against the law for a minor to travel without being strapped in, in the proper child seat. DH said it wasn't against the law if the car didn't have seat belts fitted in the first place. I then refered him to my first comment about it being illegal to travel with children not strapped in. And if the car hasn't got seat belts then it's illegal. DH still thinks it isn't and the law doesn't cover cars pre-seat belts.
I think I'm right. Can anyone set the record straight here.