In reply to iceox:
No idea, I'm a punter boulderer somewhat removed from the uk climbing scene
The answers are going to mostly fall into:
*Too hard - Practiced to death by the super dedicated or simply put up by the super talented
*Too dangerous - Worth risking youur neck for the FA but not a repeat
One or two will come under:
*Unusual phisique or skill required - eg tall, short tiny hands, no sense of pain
*Unpublicised
*Inaccessable
jk