UK Chagos Archipelago treaty faces delays over US support

The implementation of a treaty regarding the Chagos Archipelago has stalled, with UK Defence Secretary Wes Streeting noting a lack of support from US President Donald Trump. The agreement, signed in May 2025, aims to recognize Mauritian sovereignty over the islands while ensuring the continued joint use of the Diego Garcia military base by the United Kingdom and the United States for an initial 99 years.

Negotiations involve complex legal and financial arrangements. The UK estimates annual payments to Mauritius would average £101 million, with a net present value of £3.4 billion. While the treaty allows for a potential 40-year extension, Mauritian Prime Minister Dr. Navinchandra Ramgoolam has maintained that sovereignty over the archipelago is non-negotiable, suggesting legal action if the matter is not resolved promptly.

In a separate parliamentary proposal, Conservative MP Sir Edward Leigh suggested selling the Diego Garcia base directly to the United States for £6 billion to help fund British defense spending. However, Secretary Streeting rejected this option, stating he believes an agreement can be reached between Washington and Port Louis to ensure the long-term operation of the strategic site.