The agencies will be asked to provide strategic recommendations on how the companies in the group, which include Eurostar, Deutsche Bahn and SNCF, can best promote their CSR and environmental credentials across Europe.
The winning agency will create a pan-European campaign that is expected to criticise the carbon footprint made by aeroplanes, while promoting the use of trains to business travellers.
The campaign will also take advantage of the pan-European travel opportunities created by the launch of the new Eurostar service from St Pancras. Eurostar's most recent advertising campaign promoted the new station by using stop-motion photography of the building over the course of a day. It was created by Fallon.