In reply to rocksol:
A bump on this (and slight highjack).
Planning doing the 'Royal Traverse' (Miage-Bionnassay-Blanc plus continuation of Midi Traverse) which would involve descent (col de la Brenva, Mont Maudit and Mont Blanc du Tacul) at the end of a long day from Durier hut (Bionnassay-col de Dome-Blanc).
Obviously this puts the descent late(r) in the day, so was after accurate/current info on the state of this. I'm aware it's 'always dodgy' but if it is particular so then might adjust timings and bivi above Maudit/Tacul serac area to descend at an earlier (better) time.
Cheers
Rob
PS have obviously e-mailed OHM as well.
Post edited at 12:14