The climb goes up the "fairly obvious" line to the right of the main face, or 100m left of a huge triangular yellow overhang (this could be the "map of Africa" choss just right of Groseness?). It finishes just where the third cliffline peters out. Good luck! Any fixed gear would be rusted away most likely.
18m Start up an awkward chimney then onto the R wall. PR up to belay. 2) 18m Scramble carefully up.
18m Move easily still
30m Up a short wall to scrub beneath the prominent corner overhung at the base.
34m (crux) Overcome the overhang via the wall then very pleasant climbing straight up.
24m More scrub, up.
21m Still scrubby, up.
15m Up in corner, PR
38m An exposed pitch, leftwards across yellow rock to tree. Up to left BR above tree. Tree belay.
5m Up scrub.
9m Up in corner and right.
9m Up crack on the right.
21m Up Chimney of upper (3rd?) cliffline.