The EU said travellers should allow extra time for their journeys on rail networks and at some maritime ports.

Meanwhile, EasyJet said it has been informed of strikes by airport security and border control staff at Frence .

“We are doing everything possible to minimise the impact of the strike on our customers, and we advise all passengers to leave extra time to get through the airport as security queues may take longer than usual,” it said.

Air passengers are urged to check the status of their flights.

Airline lobbying group A4E called on the French government to consider measures to improve the predictability of the strikes’ impact and decrease their damage to the French and European economy.

“The uncertainty about the impact, and escalating delays throughout a strike day, force airlines to cut back on their flight programme,” said A4E managing director Thomas Reynaert.

“Airlines cannot wait hoping that air traffic controllers will turn up at their control centres – our members need to protect the integrity of their flight schedules to avoid knock-on delays and cancellations that impact on customers.”

It said two-thirds of all European ATC strike days take place in France.