In reply to NeilOMalley:
I did this route on my first trip to Cham, the old hut was on the face so spent a night in that then up the route and down then nantilon and back to Cham. If I were you I would go for it this way, take light bivi gear, crampons, axe and climb in big boots, it's not a hard climb and doing it this way will set you up more alpine routes. Abbing down the route would be a nightmare and you would have to leave loads of gear + stuck ropes. Take the train up about midday, climb to the old hut site with enough water etc, bivi, start early you should be fine, the glacier should be ok, it's shrunk back a lot over the years.