In reply to The Norris:
Perch always has been unstable, and always will be.
Great care should be taken on all the routes there, its not a place for the fainthearted or inexperienced.
The lower tier is generally better, but full collapse of Junkyard Angel happen a few years ago. The upper tier is ok in places (generally where the routes are) but all other rock should be given a wide bearth.
I'll drop in when next passing.