The beleaguered Eurostar service has warned against all but essential travel from Paris until 3 April as the French customs protest continues.

After almost a month of travel chaos at Paris' Gare du Nord station, Eurostar on Thursday warned that industrial action was likely to continue until early April.

The company has said on its website: "Due to industrial action by French customs, we are experiencing lengthy queues at Paris Gare du Nord station and expect this to continue until April 3rd. We strongly recommend that you do not travel during this period unless necessary."

The operator is offering free refunds or ticket changes during this time.

Various trains have been cancelled over the coming days.