The collaboration comes as Eurostar reports growing demand from business travellers to support sustainable travel initiatives.

Travellers using the Eurostar for Business platform will be given the option to pay £3 per tree for Trees4Travel to plant trees on their behalf when they book a journey.

Eurostar has pledged to plant another tree for each one planted as a result of the tie-in.

Nico Nicholas, co-founder and chief eco officer at Trees4Travel, said: “This Eurostar initiative will not only draw down more than double the carbon created by any of the journeys it represents, but also should inspire other carriers to recognise that so much can be done if we only work together on climate action.”

Eurostar’s head of indirect sales and distribution, Paul Brindley, added: “We are committed to reducing our own impact on the environment. We know sustainability is at the heart of business travel policies and we are always looking for more ways we can help our business travellers to be part of creating a more sustainable future.”