I think the requirement is just for a seatbelt. Most tend to have a lapbelt.
I regularly travel on National Express coaches (London return for ~£13!) and pretty much all their coaches have three point. I'd say only about a third wear them. Guess some folk are just too cool to belt up.![]()
Hummm, I'm never the first to call for state intervention but putting them in cars was a good thing. The technology is there to also allow the driver to be alerted if the seat belts are undone whilst moving - I don't feel this is unjust in anyway to anyone bar the coach company who have to stump the cost of fitting them to their fleet.