Could be (tombstones :-) Didn’t we have a short thread a while ago about new circles? Think there’s one in Milton Keynes as well...
You’re dad was right about some of them (roundabouts not stone circles) being lethal though. The worst ones are those with roads that don’t meet the roundabout square on (as in a 12, 3, 6 or 9 position) but sort of skim one edge of the roundabout – people speed along those as if there’s no roundabout there at all!