In reply to Black Mamba: I haven't got the guide to hand but you climb up from the belay half way up the flake, lean round flake to find a horizonal break running out left, pull round then traverse 1m, then pull up and trend slightly right to the top of the flake.
It felt about E1 5b/ maybe HVS a little exposed but really good quality climbing. We belayed at the far left end of the flake on a blocky ledge, quite a bit of drag but sets you up well for the next pitch,
Gareth