Full Breakdown
Burnham Signals Review of the Chagos Islands Deal Amid U.S. President’s Opposition
By Drooid · · How we work
Core Event: Review of the Chagos Sovereignty Transfer
On September 22 2026, UK Prime Minister Andy Burnham met U.S. President Donald Trump on the sidelines of the United Nations General Assembly in New York. Trump called the UK-Mauritius agreement on the Chagos Islands “terrible” and “ridiculous,” and Burnham said he would “look at it.” Days later the British government announced the treaty – which would hand sovereignty to Mauritius while retaining a joint UK-U.S. base on Diego Garcia – is under review and its parliamentary passage has been paused.
Background & Context
The Chagos Archipelago, an Indian-Ocean chain about 300 miles south of the Maldives, was detached from Mauritius in 1965 so Britain could build a U.S.-UK military base on Diego Garcia. An International Court of Justice ruling in 2019 found the separation unlawful and urged the UK to end its administration. A 2025 treaty would transfer legal ownership to Mauritius while allowing the base to operate for at least 99 years.
Data & Statistics
- Approximately 3,000 UK and U.S. personnel are stationed on Diego Garcia.
- The treaty provides for the United Kingdom to pay Mauritius an average of £101 million per year for the base lease.
- The UK estimates total payments of about £3.4 billion over the 99-year term; Conservative critics project an inflation-adjusted cost of roughly £35 billion.
Official Statements & Responses
The UK Foreign Office reiterated that the agreement was intended to guarantee the base’s future after the 2019 ICJ decision.
Conservative shadow justice secretary Robert Jenrick called the treaty “a strategic disaster for Britain,” and Reform UK leader Nigel Farage said “the Chagos deal is dead.”
Criticism & Opposition
Trump labelled the arrangement “a terrible deal” and questioned Mauritius’s claim, emphasizing Diego Garcia’s strategic importance for U.S. bomber operations. Conservative and Reform UK politicians warned that Mauritius’s ties to China could jeopardise the base.
Conflicting Reports & Gaps
- Cost estimates: Government cites £3.4 billion total; critics argue it could reach £35 billion after inflation.
- Legislative status: The treaty requires new legislation; progress was halted in April 2026 after U.S. pushback, with no new timetable.
- Implementation details: The lease runs for 99 years with an extension option, but precise terms of any revised agreement remain unspecified.
Verbatim Quotes
- “I don't support it. I think it's terrible. It was a terrible deal.” — Donald Trump
- “The Chagos deal is dead. Thank God.” — Nigel Farage
What’s Next
The UK must introduce legislation to ratify the treaty, but the process is on hold pending further diplomatic negotiations with the United States and Mauritius. No specific deadline has been announced, and the outcome will depend on whether a revised arrangement can satisfy both U.S. security concerns and UK fiscal constraints.
