For a lot of people, the default way to get from London to the French Alps to go skiing is to fly, then take a long bus connection to get to the resort. However, with the current snow and wintery conditions, a lot of this option has tended to leave you stuck in a London airport, and not on the slopes after all....
As an alternative, is it possible to take the train from London? If direct is possible that'd be best, but otherwise minimal changes - lots of changes aren't fun when you've got skis and lots of luggage full of bulky warm clothes!
(Note - I already know the answer to this one, but everyone else in our Chalet were stunned to learn it could be done and that we had, so clearly there's a lot of people who don't realise it!)