A can of worms i know, but could someone explain how the Northumberland B grade system works incomparison to say V grades or Font grades, the system seems to be very inconsistant B5 seems to cover anything from V4 to V7,depending on venue -such strangeness, any benchmarks for routes such as, Captain Haddock, Yorkshire 8a, The Crack at Bowden- {]given B7 in guide but i have heard is Font 8a} would be appreciated. The Northumberland area has to be one of the best bouldering areas in the country, it astounds me that the guide to the area is so poor, to keep the tourists away me thinks.