In reply to davkeo:
If you get desperate there is a small wooden shack perched precariously at the top of a cliff nearby that is free to use. It's about the size of a garden shed and has a few bunks with some manky foam mattresses and blankets. I stayed here a few years ago in the summer, it was cold and had no door but was slightly better than bivvying on the glacier. At the time I was unemployed and skint and keen not to pay for the prices cosmiques hut; I've been back to the area but just pay for the hut now.
Edit:
Forgot to say the hut has a name, but I can't for the life of me remember what it is. There is a small plaque inside with it on, someone told me it's dedicated to a well known climber who died.
Post edited at 14:36