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As an alternative to the snowtrain why not take the scheduled London to Paris Eurostar and change stations on to the TGV from Paris to Bourg St Maurice. There is the disadvantage of changing stations in Paris, but this can be eased by taking a taxi between the stations. The advantage is that you have more flexibility with traveling times and the fares can be cheaper if you book early.

If you end up at Bourg St Maurice you can take time to enjoy the French town life with many interesting bars and restaurants. The Bazoom Bar is a favourite of ours, directly opposite the station. You can enjoy several hours having a good meal and watching the world go by whilst waiting for your transfer taxi/bus or before you board the return train.

The transfer times are very short in comparison to the airports, often in the region of 30 mins for Les Arcs, La Rosiere and Tignes / Val d'Isere. There is a funicluar railway directly up to Les Arcs. For La Plagne and Les Trois Valleys you have to use stations before Bourg St Maurice or the transfer is longer.]]> http://www.ivebeenthere.co.uk/tips/16398