In reply to pec:
Yes the Bat had new bolts about 5 years ago which made it quite straightforward. Unlike about 15years ago when three consecutive bits of gear on the roof were:-
rusty upward placed peg held in by small wooden wedge
downward pointing bolt (no hanger) with sling larks footed on.
troll bolt with bent hanger not able to take a krab so hooked with a nutkey
Good old British aid!!
Kyrie Eleisen good on a wet day - we started up the obvious rock pillar at the back of the cave then traversed into the normal route. Rope drag a problem - over extend everthing or only leave every second or third clipped. If you have no belay seat its possible to return to ground from midway, belay from there then jug up and continue - saves some pain!!