In reply to Richie Patterson, Wild Country: Dave, Jason writes
"Oh christ, check these dates out; Crookrise Roof – July 1996, Red Baron direct – October 1995. They’re about the same difficulty I thought, Crookrise roof perhaps a tad harder, though both have lots of scope for tricks + jessery to be developed over the decades. Could be Yorkshire 8a, definitely not Northumberland 8a."
Also he says
"There is some really gnarly stuff at Caley by Al Manson which pre dates even these by quite a time" but doesn't give any details...