Portable loos and burger vans next to the A2 or M20 for summer holidaymakers weren’t what anyone had in mind when Britain voted to leave the EU.

But 10 years after the referendum, families heading to Dover or Eurotunnel could end up having to use makeshift facilities at two emergency sites in the event of traffic chaos caused by the EU’s new post-Brexit digital border checks.

One of two locations earmarked under Government planning for Kent’s roads being clogged up by delays from the Entry/Exit System (EES) is the abandoned Folkestone Racecourse.

Its derelict grandstand, now awaiting demolition, once rang to the roar of punters cheering on jockeys like Tony McCoy or Kieran Fallon.

But Britons’ post-Brexit status as “third-country nationals”, and time-consuming extra border processing now needed to cross Schengen countries’ frontiers, could see weary tourists diverted onto the course if gridlock paralyses Kent’s roads.