Travellers on both sides of the Channel are facing further disruption as a strike looks set to keep the Port of Calais closed until Thursday.
A Kent police spokesman, who said the force is "currently aware" of disruption to Eurotunnel services in both directions, said: "It is anticipated that due to industrial action in France the Port in Calais will remain closed until Thursday."
Travellers planning to use the Channel Tunnel are urged to check with the operator before starting their journey.
Ferry services to and from the Port of Dover in Kent are also being affected by the strike, which started at the northern French port at 2.20pm on Monday.
Migrants took advantage of a wildcat strike last week by trying to board UK-bound lorries held up in queues at Calais.
Migrant numbers close to the port have swollen to more than 3,000 since April.
British truckers have reported facing violence and intimidation, and fear being fined if migrants clamber aboard their trucks.
Some now take lengthy detours to avoid Calais.
PA