that was stress free.
Stripping the door card off is fairly easy, care taken prevents the clips getting broken. The membrane showed signs of having been disturbed before and the glass stop is of the new type. The glass stop had somehow climbed over door stop, if that makes sense?
I undid the forward door stop and operated the elec window switch, allowing the glass to drop back into place. Then refitted the door glass stop and closed the window, which promptly climbed over the stop again!
A couple of goes at adjusting it got it to a point where it was stopping as it should. I then closed the roof to check the seal, looks ok but I suppose I'll have to wait until it rains again.
Not entirely sure about a long-term solution. The newer stop is already in place, it doesn't look excessively worn or anything. My inclination is to suck it and see, if it climbs over again then I might extend the lip on the door glass stop by 5 mm or so?