There was a q&a last night on another forum were somebody asked that question. The answer was along the lines of not yet but they would have to do some research into whether there was problems with the vans that have them. I know from my mobile caravan engineer,that last year he made a fortune out of resealing the ones on the swift vans due to leaking.
Even bigger front windows? I sometimes wonder if this is the reason UK built caravans appear to have more damp problems than German built 'vans. UK vans have always had large windows accross the front. German 'vans usually have much smaller front windows or even no front window & smaller windows generally which would make for a more rigid body.
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.