Climbs the gently overhanging wall to the left of the arête. The FA set two rules: the obvious sloping ramp at ground level is out, and so is the hanging right arête. The standing starts (using the ramp) are easier and worthwhile and still take in the fun last move.
There are two variations, both starting and ending in the same place, the left-hand version being a bit better and harder. Sit-start matching the chest-high rail (feet up off the ramp!).
A/. LH version 7b/+: Use the left arête to gain the line of edges on the face. Span out to the crack on the right, then pop for the top.
B/. RH version 7b: Reach into the hanging crack on the right and work up it until the edges out left can be reached, then pop for the top.