In reply to i.munro:
>The belay looks like it's in the right place it's just, as usual, too short. The Krab should be below the overhang.
By the looks of it just above his harness in the picture.
The lower, or upper overhang, though? if the anchor is between the two overhangs, there's still the problem of the rope rubbing in the groove; if it's below both overhangs the anchor is only actually about 3m? (if memory serves) above ground level.
I'm with you in principle but I think this is an example of a route where there isn't a way to rig the anchor that's not going to cause damage, IMHO. Repairing the groove with cement as has been done elsewhere would be unsightly but might stop further erosion.