The Foreign Office is warning of potentially violent protests in France on 6 April when large-scale demonstrations are planned to coincide with co-ordinated strike action.

It pointed out that there has already been a number of ‘spontaneous’ protests in central Paris and elsewhere in France, some of which have turned violent.

And Ryanair is warning that air passengers could continue to face flight disruption into April due to striking French air traffic controllers (ATC).

The airline has been ordered to cut 60 flights today, due to a four-day strike that is due to last until Friday.

Ryanair boss Michael O’Leary told an Airlines for Europe conference in Brussels yesterday that it was asked by French ATC to slash its flight with less than 48 hours’ notice.

“And then also the wonderful news that the daily French ATC strikes will continue for the month of April. Daily,” he said.

Other airlines, including easyJet and British Airways, are also suffering disrupted services to Europe today, due to the French ATC strike.

Flights between the UK and other European destinations, not just France, are affected.

In an update to its travel advice for France, the Foreign Office said there is ‘ongoing strike action affecting multiple sectors, including transport networks’.

It added: “Coordinated strike action and large-scale demonstrations are next planned for Thursday 6 April. Industrial action may start the evening before the strike day and run for several days.

“You should monitor the media, check the latest advice with operators before travelling, avoid demonstrations and follow the advice of local authorities.”