In reply to niggle: AFAIK the area of natural rock at the back of the arena (ie between the main and competition walls) had no recorded routes on it before the work began to build the climbing centre. This was because most of the area now occupied by the arena was filled with quarry spoil. I believe some "raiders" from Alien Rock did put up a couple of bolted routes on that face after it was cleared, and in fact I seem to recall that the hangerless bolts were still visible protruding from the rock at around the time the climbing centre first opened. Subsequent to that some new bolts did appear, and I think the old ones were chopped, but climbing has never allowed on any of the natural rock within the arena.
More worryingly, there seems to be some doubt as to whether the council are going to allow climbing on the outdoor rock as well:
http://forums.scottishclimbs.com/index.php/topic,4745.0.html