Eurostar security staff are to take strike action this December, the RMT Union has announced.
Action will take place on the 16th, 18th, 22nd and 23rd December in a dispute over pay.
The RMT Union says that some workers earn £10.66 an hour and workers have rejected a below inflation pay offer.
The union has also said that the action will severely affect Eurostar services in the run up to Christmas.
Over 100 staff are expected 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.
“I urge Mitie and Eurostar to come to a negotiated settlement with RMT as soon as possible.”
