Security staff working on Eurostar train services have announced plans to strike in the run-up to Christmas over a pay dispute.
Members of the RMT union have rejected a "below inflation pay offer" and "emphatically" voted to take strike action, with walkouts planned for 16, 18, 22 and 23 December which will "severely affect Eurostar services".
RMT expects more than 100 staff, who are contracted out to facilities management company Mitie, to take part in the action.
RMT general secretary Mick Lynch said: "Eurostar security staff are essential to the running of Eurostar, and it is disgraceful they are not being paid a decent wage.
"They work long unsocial hours and a multimillion-pound company like Mitie can easily afford to pay them decently for the essential work they do. We do not want to disrupt people's travel plans, but our members need a pay rise, and this is the only way management will listen."
In a statement, Eurostar said "negotiations between Mitie and the Unions are ongoing. If there is any impact on services we will update customers as soon as possible."
The Business Travel Association's chief executive, Clive Wratten, said the move was “another disappointing blow to business travellers across the country”.
He added: “We urge the government and the unions to come to a better conclusion so that travel may get back on track ahead of a busy Christmas period.”