Below is an extract from the BBC news website.

The RAC is discouraging UK drivers from taking extra fuel supplies over to France.

Aside from the safety risks, authorities only allow drivers to carry an additional 10 litres of fuel with them upon entering French territory.

Also, most ferry operators do not permit the carrying of any additional fuel in cans, the motoring body says.

Earlier this week, the AA reported taking calls from motorists who had run out of fuel in France. It is advising people to fill up before crossing the Channel.

Shell says it has seen an increase in demand at its petrol station on the M20, near Folkestone, while BP says it has not seen any rise in demand for fuel, with usual deliveries scheduled for stations in Kent.

Can drivers carry extra fuel across to France?

The transport of petrol cans onboard Brittany Ferries' ships is forbidden. The transport of diesel in vehicles is only permitted in containers or jerrycans specifically constructed for the carriage of diesel and to a maximum of 5 litres per vehicle.

Fuel cans must not be brought on board DFDS Seaways ferries.

P&O Ferries said on Twitter that passengers were now able to bring five litres of spare fuel on board, provided it was in an "approved container".

Eurotunnel allows up to 30 litres of fuel to be driven over, depending on the type of container.

Some parts of France have restrictions on carrying fuel.

Hope this helps.