If you're doing BS on the day it may be worth having a pacer/Nav man waiting at the top those supporting can contour round via the west wall and lead you down to Wasdale from there.
That sounds like a great solution, thanks Ian. I was wondering how the logistics of ropes and non-BS pacers would work! That's assuming I have the courage to get up there!!!
Have you any idea how much time BS will save compared to the tarn?