Take a Eurostar direct to Lyon, where you simply change platform to take a local train to your ski resort.
The Eurostar Ski Train daytime service, direct from London to the Tarentaise resorts of the French Alps, makes you wonder why you ever flew.
Eurostar's direct overnight Ski Train to the Tarentaise region of the French Alps and has a cafe bar and reclining seats, but no actual couchette beds.
Take a Eurostar to Paris and then a smooth, fast TGV train to ski resorts all over France - and to some in Italy, Switzerland and Austria too.
Take a Eurostar and then a Corail Lunea sleeper train to French, Italian and Andorran resorts.