Eurotunnel has held a round of tests to prepare for a possible no-deal Brexit on October 31.
The tests were held to check that a new “digital border” between France and Britain would work seamlessly and keep traffic flowing in the event of new controls.
Eurotunnel spokeswoman Anne Laure Descleves warned that transport companies must declare freight in advance to make the journey, warning that “teething problems” could exist at the start.