isn't TVBATVS like F8b thus probably not monterously hard as far as bouldering goes (he says).i doubt smoked salmon is all that hard - if you see the vid of scut doing it that is.did't he have a thread about this before? i think nik jennings said theres some big slab somewhere in lancs with 2 english 7b projects on. and if nik has tried them and they're still projects then they must be damn hard.i think nik also said there a direct start to dougal at rivelin quarry the's only been repeated with a run-up, and the actual climbing way is uber-nails.
Just to bring things back to the question of hard UK boulder problem slabs isn't Monobloc a slab? And isn't it supposed to be hideous? May be a contender for hardest UK slab (dunno though as I have never seen it, only heard the reputation...)