S peeding effortlessly towards the slopes by train, you might wonder why you ever flew to a ski resort. On paper, it seems a short hop by plane; in reality, airport queues, cramped flights and long transfers can mean the journey eats up a whole day.

Measured door-to-door, daytime rail travel from London can be as fast as flying, while taking a sleeper train gets you extra time on the slopes. And with Alpine glaciers suffering significant loss of snow cover as global temperatures rise, rail travel constitutes the biggest emissions saving a skier can make.

An exciting recent development is the arrival of a dedicated sleeper train for skiers, the Travelski Night Express (TNE), launched last winter and with an additional new route for the coming one.…