In reply to Ron Rees Davies:
> I have played Mornington Crescent many times, but I have always backed of whenever 'Harrison's' has been invoked - unless you're almost professional, getting back onto the circle or district lines can be impossible.
Funnily enough, in the current edition of Mornington Monthly, Sikorsky has nailed it: use a Reverse Drop Knee*, which automatically deposits you at Hyde Park - from where the way should be clear.
(*Standard Hemp Rules apply, unless The Downfall's in)
It's not just beginners: couple of years ago at Sennen, some young hotshot was trying that nasty little E6 left of Doorpost, where the crux is definitely in groundfall territory. What you really need is a mobile belayer, waiting to run; unfortunately, the second was safely tied in at the base, as specified in every 1950s instruction manual. When we tried to gently point out the potential problem, we got a mouthful of bluster and abuse. Everybody stopped to watch.
(Un)fortunately, his mate didn't actually get high enough to place any gear. We weren't convinced they even knew which route they were on....