I've heard about the possibility of them being banned in road-going classes at hillclimbs and sprints (hopefully not gonna happen), but never heard of them becoming non-road legal.
Don't know about R888's. I'm on about other things really, ITV (MOT) over here is a nightmare. Even if something 'aftermarket' is E marked they won't let it pass through the ITV.
I´m over here now Kane, and some of the crap I see driving about ,you surprise me.