UK-Mauritius Treaty on Chagos Islands Faces Major Setback Amid US Withdrawal

Ahmed Hassan, International Editor
4 Min Read
⏱️ 3 min read

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A proposed treaty aimed at transferring sovereignty of the Chagos Islands from the United Kingdom to Mauritius has encountered significant obstacles, with a British minister declaring that reaching a political consensus has become “impossible.” The announcement follows the withdrawal of US support for the agreement, which has forced the UK government to halt its legislative efforts.

Breakdown of the Treaty

The treaty was initially framed as a collaborative effort between the UK and the US, aiming to cede control of the Chagos Islands to Mauritius while allowing the UK to maintain a military presence on Diego Garcia for an extended lease of 99 years. However, Stephen Doughty, a minister from the Foreign Office, indicated that the shift in US policy under former President Donald Trump has rendered the treaty untenable.

Doughty explained in the House of Commons that the agreement had previously been endorsed by Trump, who had labelled it “very strong and powerful.” This endorsement had provided a foundation for negotiations that spanned multiple US administrations, indicating a robust framework for the treaty. Yet, the recent withdrawal of American backing has complicated the situation, making it impossible to update the existing 1966 UK-US agreement concerning defence operations in the region.

Legislative Implications

The failure to secure US support has direct consequences on the legislative process in the UK. Doughty confirmed that the necessary updates to the long-standing agreement could not be ratified, thereby preventing the “Diego Garcia bill” from advancing through Parliament this session.

“The government nevertheless remains confident that the Diego Garcia treaty is the best means of protecting the full operation of the military base for future generations, for us and our allies,” he stated, suggesting that despite these setbacks, the UK still sees strategic value in the arrangement.

Chagossians and the Path Forward

This development has been particularly disheartening for the Chagossian community, many of whom view the transfer of sovereignty to Mauritius as a vital step towards their potential return and resettlement. Doughty acknowledged the disappointment felt by many within this community, stating, “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.”

With the legislative pathway now obstructed, the future of the Chagos Islands remains uncertain. The UK government’s inability to proceed may further complicate relations with Mauritius and hinder the long-term prospects for those displaced from the islands.

Why it Matters

The stalling of the treaty over the Chagos Islands reflects broader geopolitical tensions and the shifting dynamics of international alliances. The withdrawal of US support signifies a potential rift in UK-US relations, raising questions about the future of military cooperation in the Indian Ocean region. For the Chagossians, this represents not just a political failure but a continued struggle for recognition and restitution, underscoring the enduring legacy of colonialism and its impact on local populations. As the situation evolves, it remains crucial for the international community to advocate for the rights and voices of those historically marginalised in such negotiations.

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Ahmed Hassan is an award-winning international journalist with over 15 years of experience covering global affairs, conflict zones, and diplomatic developments. Before joining The Update Desk as International Editor, he reported from more than 40 countries for major news organizations including Reuters and Al Jazeera. He holds a Master's degree in International Relations from the London School of Economics.
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