Thousands of migrants dumped on Britain as French wriggle out of border promise

Thousands of migrants could be dumped on Britain’s doorstep if France tears up a historic border agreement, it was claimed last night.

Officials have vowed to do “everything in their power” to wriggle out of a treaty moving the UK border to Calais.

The besieged town’s mayor Natacha Bouchart is prepared to spark a major diplomatic row by opening the frontier …