In reply to Duncan Bourne:
Duncan, thanks so much for posting about this - I saw it Thursday night when twelve of us were due to travel from London for the weekend, staying in the Whillans hut plus eight being on a guided training day. So with your warning and a bit of supreme crisis planning we relocated to the Eastern Peak and had a good stay, plus the course, plus a lot of enjoyment.
So, once again, thanks. If our paths ever cross I owe you a pint.