I have this from someone (probably BA?): Park at the Sundial car-park and follow the walking track north down into Devil's Gap and up onto the top of Bellfield Peak (20-25 minutes). Descend the gully on the north end of the peak and bash back around to the climbs. An abseil approach down 'Rolling Thunder' is convenient to most of the climbs. One 60 metre abseil or 2 x 30 metre if climbing out up 'Rolling Thunder'. Watch the rope ends, there isn't much rope to spare on these.
For the very left end of the cliff (only 1 climb), cut off to the right before the track climbs up to the top.