Mixed Fortunes 70 ft VS 4c
Start on the ledge at the left end of the “Azimuth Slab” directly below the upper part of First Corner. Climb the cracked wall directly (through a vertical rectangular slot at 3 metres) to the foot of the steep part of First Corner, and finish up that route.

Whoops! Recently discovered that this isn't a new route at all, it's just the direct start to the V Diff First Corner. That'll teach me to read the guide more carefully. Still, at least I got the grade right.