Calais mayor Natacha Bouchart has threatened to send the 'Jungle' to Dover

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Natacha Bouchart has urged the French government to immediately begin renegotiating the treaty, which allows British border police and officials to operate in the French port.

These officers frequently catch migrants attempting to stow away on trucks and lorries in order to make it through the Chunnel to Britain.

Removing them from the transport hub could result in huge numbers of unmonitored people making their way to Dover, where a new camp could emerge.