The Road Haulage Association says it is receiving reports from hauliers experiencing attacks by migrants as they approach the last leg of their journey home.
Chief executive Richard Burnett said: “Regrettably, this comes as no surprise. Following the demolition of the Jungle last October, we warned that such action would not the end of the problem and the latest news shows that we were right.
“Operators and their drivers cannot face another summer of threats and intimidation and the cost in terms of lost and damaged loads is massive. But more importantly, the cost in terms of trauma for the drivers; the men and women who are simply trying to do their job is inestimable.
“Security needs to be increased and, as during the past two summers, we shall continue our call for deployment of the French military.”