Normandy council president Herve Morin said 40 percent of heavy goods vehicles arriving at the ports will be subject to veterinary and plant health controls after the end of planned Brexit transition period in 2020.

Morin said he was worried about the consequences that such controls could have on the flow of trucks going to and from Britain by ferry across the Channel.

Each year, 100,000 trucks go through Caen, 50,000 through Cherbourg, 30,000 through Le Havre and 10,000 through Dieppe.

“Our major concern is on the degree of preparation,” Morin said in London, during a two-day visit to Britain. “It is probably not enough with regards to animal health controls. The customs posts are much better prepared.”