Trump Calls UK's Chagos Deal with Mauritius 'Act of Total Weakness'

LONDON (Reuters) - US President Donald Trump said on Tuesday 20 January 2026 that the UK's deal to cede sovereignty of the island of Diego Garcia in the Chagos Islands to Mauritius was an "act of total weakness," adding that it was "another in a very long line of national security reasons why Greenland has to be acquired".

The island of Diego Garcia houses a strategically important US-UK air base in the Indian Ocean.

The UK and Mauritius last year struck a deal to pass on the sovereignty of the Chagos islands to Mauritius while allowing the UK to retain control of the air base under a long-term lease.

The deal had previously been supported by the US administration which said when it was signed in May that it "welcomed" the agreement and commended efforts to secure the long-term operation of the joint military base.

UK minister says deal is best option

Trump wrote on his Truth Social account: "Shockingly, our 'brilliant' NATO Ally, the United Kingdom, is currently planning to give away the Island of Diego Garcia, the site of a vital U.S. Military Base, to Mauritius, and to do so FOR NO REASON WHATSOEVER."

Trump said there was no doubt that "China and Russia have noticed this act" by the UK.

British senior minister Darren Jones said on Tuesday that the deal was the best option for the military base, allowing it to operate for the next 100 years.

"The treaty has already been signed," Jones told Times Radio, adding that that could not now be changed.

"The best way we believe for Britain to respond ... is convening around the world using our diplomatic heft and using the Prime Minister's relationship with the President to protect British interests," he added.

British Prime Minister Keir Starmer has built a solid relationship with Trump, becoming the first leader to secure a deal to lower some tariffs, but their connection has been shaken in recent days with disagreement over Trump's approach to Greenland and now his comments on Diego Garcia.

Trump has previously said that the encroaching presence of China and Russia makes Greenland vital to US security interests, and repeatedly insisted he will settle for nothing less than ownership of Greenland.

The UK's deal with Mauritius was delayed after Trump's inauguration in January 2025, with London wanting to give the new administration time to examine the details of the plan.