UK-Mauritius Treaty on Chagos Islands Stalled Amid US Support Withdrawal

Michael Okonkwo, Middle East Correspondent
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⏱️ 3 min read

The prospect of a treaty transferring sovereignty of the Chagos Islands to Mauritius has hit a significant roadblock, with a UK minister declaring that reaching an agreement at the political level has become “impossible.” This development comes as the United States has retracted its backing for the proposal, jeopardising the legislative process in Parliament.

A Diplomatic Standstill

Stephen Doughty, a minister from the Foreign Office, addressed the Commons, revealing the collapse of negotiations that had once seemed promising. The initial discussions had been conducted in close collaboration with the US, which under former President Donald Trump had deemed the treaty “very strong and powerful.” However, the shifting political landscape has left the UK government scrambling to adapt.

The proposed agreement would have seen the UK formally cede sovereignty of the Chagos Islands to Mauritius, a move that included a 99-year lease on Diego Garcia, home to a major UK-US military installation. Doughty noted that the recent withdrawal of US support has rendered it impossible to modify the existing 1966 UK-US agreement, which provides for the defence use of British Indian Ocean territories.

Legislative Implications

Doughty explained that the treaty’s failure to progress means that the Diego Garcia bill will not advance in this parliamentary session. He stated unequivocally, “the Diego Garcia bill can therefore not complete its passage this parliamentary session and cannot be carried over due to its advanced progression through parliament.” The implications are significant, as this setback signals a deterioration in UK-US relations, particularly in light of Trump’s recent criticisms of Labour leader Keir Starmer regarding his stance on the Iran conflict.

The minister expressed regret over the effect this delay will have on the Chagossian people, many of whom view the treaty as their best hope for a sustainable resettlement programme. Doughty acknowledged, “the delay to the treaty will be sad news to many Chagossians – although I accept not all – who rightly see it as the only viable means to a sustainable programme of resettlement, which Mauritius would be able to implement under its terms.”

The Broader Context

This diplomatic setback is not merely a technicality; it reflects deeper geopolitical tensions that have emerged in the wake of changing leadership in the US. The withdrawal of US support raises questions about the future of the military base on Diego Garcia and the long-standing relationship between the UK and Mauritius.

As the UK navigates this complex landscape, the fate of the Chagos Islands remains uncertain. The Chagossians, forcibly removed from their homeland decades ago, continue to fight for their rights, and the promise of resettlement hangs in the balance.

Why it Matters

This development is more than just a legislative hurdle; it encapsulates the fraught dynamics of international relations in a changing world. The stalling of the treaty not only impacts the future of the Chagos Islands but also underscores the fragile state of UK-US relations. For the Chagossians, the promise of returning home is now shrouded in uncertainty, reflecting a broader struggle against colonial legacies and the complexities of global power dynamics. As the geopolitical chess game evolves, the voices of the displaced must not be silenced, for their future hangs in a precarious balance.

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Michael Okonkwo is an experienced Middle East correspondent who has reported from across the region for 14 years, covering conflicts, peace processes, and political upheavals. Born in Lagos and educated at Columbia Journalism School, he has reported from Syria, Iraq, Egypt, and the Gulf states. His work has earned multiple foreign correspondent awards.
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