In reply to SC:
There are quite a few faces with climbing potential in the Gorge (though ivy clearance would be needed to maximise potential), but think the negotiated access is only to a couple of areas. One of the previous threads linked above mentions two bolted areas, I had a walk there this week and saw one of these - approx. 12m face with two bolted lines on it and another line just right of the bounding arete of the face, routes looked likely to be at least high 6s territory, but hard to be sure. Didn't spot another bolted area, but perhaps missed something/didn't pass it on our walking route.