Options range from high-speed sleeper trains to more leisurely regional services; where longer journeys are required, such as travel to Italy’s Amalfi coast, Exodus is offering hotel accommodation near stations to allow guests to make better use of any overnight halts.

Kasia Morgan, Exodus head of sustainability, said: "We already offer train travel to our self-guided trips, but we’re delighted to be expanding this offering by launching rail options for a number of our European small group adventures.

"The past year has given our customers time to consider both the benefits and impacts tourism can have, and has put sustainable travel at the very forefront of many people’s priorities."

Exodus said climate conscious travellers were increasingly considering the journey to be part of the overall holiday experience, and were factoring this into their choices, with rail providing an ideal opportunity to take in scenery and landscapes they would otherwise miss if they flew.

"We consider offering rail a key step towards delivering on the ambitious carbon reduction targets we’ve set through our Planet Promise, as well as a demonstration of our intent to double down on our commitment to sustainable and regenerative travel as our sector emerges from the global pause in tourism," Morgan added.