"Today’s mafias are moving among countries and continents, and where they find weakness in international cooperation, they exploit that opportunity.”

UK overseas territories such as Cayman Islands also may lose protection once afforded by UK’s EU membership.

The British Overseas Territories, while largely unknown to the British public, will be affected enormously by Brexit.

Listing sends signal that turning Britain into a low-tax island ‘will not be acceptable to the EU’.

Decision on British overseas territory comes less than two weeks after UK left bloc.