Traffic has resumed in the tunnel beneath the English Channel, but lines are still long for trucks traveling between Britain and France following a day of disruption by striking port workers.

Illegal migrants trying to sneak across to Britain are taking advantage of the snail's-pace traffic to sneak onto trucks boarding the shuttle trains that carry them through the tunnel.

Eurotunnel, which runs those shuttle trains, said traffic resumed Wednesday morning, as did the Eurostar passenger train service.

Both companies cancelled all trains Tuesday after ferry workers striking over expected job cuts swarmed train lines and set tires alight.

Migrants from Sudan, Eritrea and elsewhere are camped by the thousands in the port city of Calais trying to reach Britain, where they believe they will have better job prospects.