In reply to Andy Moles:
I was thinking the same thing and the one one that sprung to mind was P1+2 of The Pinch Direct (E3 5c) on the Etive Slabs, but I'm not sure if it strictly fit within the criteria - just depends on what your view of 'bridging' is (i.e. does it have to be with feet either side of a corner, or could it be using your body + arms as well?).
Pinch Direct fits the latter, with your arms spanning and your body tight up against the corner, with your feet walking progressively up a slender gangway - no footholds whatsoever - completely harrowing. Certainly haven't done anything anyway near this pure in the UK, but suspect there's pitches abound like this all around Squamish and it'd certainly be great training.
When it comes to the Cairngorms my initial thought was Thor (E5 6b), but whilst it does go up a corner I'm not sure whether you actually bridge it. My final thought was from the other end of the country with The West Face (E5 6b) in Bosigran's Great Zawn. I did it last year and that's got some pretty conceptual frictioneering throughout its second (crux) pitch.
Much like you though I keep thinking there's loads of things I've missed, but maybe not?!
Either way, great thread Wald!
p.s. I don't suppose you've done Agony (E2 5c) have you Andy? Always presumed this climbed more like slab, but I might be wrong - it does go up a corner after all...