In reply to CurlyStevo:
I had an early start and went up No2 Gully this morning. After a good overnight frost the snow was rock hard. The gully was banked out into a steepish slope. There was a cornice but I passed it to the left as you look up hill.
On the summit I met a climber who had just finished soloing Gardyloo. He had somehow flanked the cornice on one side. For obvious reasons I didn't peer over the edge to see how he did it.
Cheers,
Ben