The head of the port of Calais , Jean - Marc Duval , said customs and sanitary checks after Brexit could create economic tailbacks and potential food shortages in Britain . Meanwhile , a local councillor in the Calais region , Xavier Bertrand , said the problems could be 10 times worse than the Irish border . Calais has embarked on a three-year €700m (£625m) expansion plan at the port with new docks to accommodate longer and wider ferries. Puissesseau has called on Theresa May and EU chief negotiator Michel Martin to come up with plans to avoid congestion in Dover and Calais . He said : “ At the moment 70 % of food imported comes from the EU . Even if that goes down to 50 % after Brexit it still needs to flow smoothly . ”
The head of the port of Calais , Jean - Marc Duval , said customs and sanitary checks after Brexit could create economic tailbacks and potential food shortages in Britain . Meanwhile , a local councillor in the Calais region , Xavier Bertrand , said the problems could be 10 times worse than the Irish border . Puissesseau has called on Theresa May and EU chief negotiator Michel Martin to come up with plans to avoid congestion in Dover and Calais . He said : “ At the moment 70 % of food imported comes from the EU . Even if that goes down to 50 % after Brexit it still needs to flow smoothly . ”