Slight misunderstanding of the origin of the name. It dates back to the early days of Yorkshire 'ard men, going over the climb with early bearings/grease. On the dscent in either direction, braking friction would cause grease to melt and a common subsitute, in an emergency, was to use the scrapings off their sarnies.Someone will need to put a strong note in the race guide for stage 1 about the dangers of stopping for a 'natural break' on Buttertubs Pass. I walked away from the road to take a pee on a C+ forum ride and almost ended up slipping down one of the 'Buttertubs' ...
(Photo on Geograph copyright Steve Daniels.)
In other words, they 'ad ter butter t'ubs