Another way to do it would be to stop pampering criminals. We can’t just open our jails. That is one of the main reasons crime has increased.
Negotiate the Falkland Islands to Argentina. Locals choose between NZ/GB/US/AUS citizenship. In return we dump as many as the sheep will accommodate and Argentina supplies security for say, 99 years. Win win win. Getting expensive for the Brits to maintain. An honorable, save face way out.