In reply to PaulHermes:
It's in an odd place, and I only found it once I'd got both hands on the top and stood up(but before the final move/mantleshelf) and was then in a stable position to look around for it.
It's a very deep(couple of centimetres) obvious chip(maybe half a metre to the right of the obvious finish), but in such an odd place.
In my opinion it'd probably be best to drop it from any further guidebook descriptions as the route climbs great without it, and it just sets people out looking for something that's no use.