The UK has reaffirmed its sovereignty over the Falkland Islands after a memo leaked from Washington indicated that the US could withdraw its support.

A leaked internal Pentagon email suggested Washington could review its position on Britain’s claim to the islands as part of a wider punishment for Nato allies not showing support for the US war in Iran.

US president Donald Trump has repeatedly criticised Nato for a lack of support since he launched his offensive in the Middle East, threatening to withdraw altogether as he branded the alliance a “paper tiger”.

US president Donald Trump has criticised Nato for not supporting his war with Iran (AFP/Getty)

The confidential memo, which also considers suspending Spain from the alliance, floats the idea of reassessing Washington’s diplomatic support for European “imperial possessions”, such as the Falklands .

A spokesperson for British prime minister Sir Keir Starmer reaffirmed the UK’s sovereignty over the islands: “We could not be clearer about the UK’s…