In reply to Doug:
Takes a hell of a long time to get to the Chartreuse, even longer than Chamonix. Beautiful place and all that, but not close to the UK.
On the other hand, you can book a ticket by Eurostar direct to Grenoble (well, with a 2 stop RER change in Paris), that takes about 6-8 hours, quite comfortable travelling, then hire a car for the lowest possible amount when you get there. MUCH more relaxed than driving, also no need to get to airports and hang around there, fairly cheap if you are judicious with when you travel. Clearly still most of a day travelling, but will leave you much less shattered than driving all the way there and back.
Were some queries about taking ice-axes etc, but this chap wants to walk so shouldn't worry about anything more than ski-poles, also no-one objected to my ski-rando crampons a couple of weeks ago.
Post edited at 12:22