Britons have been left stranded in France after running out of fuel due to shortages caused by an industrial dispute, a breakdown recovery firm said.
The AA revealed that several of its members have needed its help due to filling stations imposing restrictions amid blockades of fuel depots in protest at labour market reforms.
The Foreign Office updated its travel advice with a warning over fuel rationing in parts of northern and north-west France.
The problem could worsden later this week as families travel to France for a half term or bank holiday break.
AA breakdown services in Europe have been taking calls from UK drivers this morning who have run out of fuel. We are recovering vehicles stuck at the side of the road to places of safety until fuel supplies are resumed.
Petrol and diesel is cheaper in France so many UK drivers often set off with low fuel and plan to fill up after crossing the Channel.
But the AA warned that this strategy could backfire.
Mr King said: "We are strongly advising our members heading to France to fill up their tanks before crossing the Channel and moderate their driving to get the best miles per gallon from their fuel. The only silver lining might be less traffic that will allow a car to travel further, typically 300 miles on one tank of fuel."