A settled history comes undone
The deal was done. Or so it seemed. A letter from the President of the Maldives to Prime Minister Andy Burnham has thrown the UK’s landmark agreement to hand sovereignty of the Chagos Islands to Mauritius into complete disarray. The president has made his position clear. His letter states he was ‘deeply disappointed’ that his nation had not been consulted before the former prime minister, Keir Starmer, agreed to the handover last year. Now Malé wants talks reopened. It is a profound complication.
The Starmer government’s 2025 agreement with Mauritius was supposed to represent a final settlement, drawing a line under decades of bitter legal challenges and international condemnation of Britain’s role in the archipelago. The dispute was settled. History was being corrected. The surprise intervention from the Maldives, a fellow Commonwealth state, reframes the entire situation not as a bilateral issue between London and Port Louis but as a complex regional contest over maritime rights. The president’s letter argues that the islands should not be handed to Mauritius at all. This is a direct challenge to the legitimacy of an accord celebrated only last year as a historic diplomatic breakthrough for the UK.
At its core, the disagreement is not about the remote atolls themselves, but about the vast expanse of ocean that sovereignty confers and the valuable economic rights contained within those waters. This is about the sea. And money. The Maldives fears that a Mauritian flag flying over the Chagos Islands will redraw the maritime boundaries of the Indian Ocean, potentially shrinking its own exclusive economic zone. This changes everything. The new Burnham government now finds itself caught between a promise to right a colonial wrong and an unexpected protest from a strategic neighbour with its own compelling arguments. One problem appeared solved. Another one has been created.
How the UK agreed to give the islands away
The origins of last year’s agreement are found in the final moments of empire. It began in 1965. Three years before Mauritius gained its independence, Britain excised the Chagos Islands from Mauritian territory, creating a new colony called the British Indian Ocean Territory. This was not a simple administrative change. It was a strategic calculation made in London and Washington, designed to create a site for a military base in the middle of the Indian Ocean, far from the oversight of a newly independent government. The UK’s action was a violation of United Nations resolutions on decolonisation which prohibited the breakup of colonies prior to independence, a legal point that would haunt British diplomacy for the next half century. The detachment was a precondition for Mauritian independence. Mauritius alleges it was coerced.
What followed was the forced depopulation of an entire people. The Chagossians, who had lived on the islands for generations, were systematically and brutally expelled between 1968 and 1973. They were denied the right to return to their homes. Most were shipped to Mauritius and the Seychelles, where they were left in poverty, a displaced community with a profound grievance against the British state. They have campaigned ever since. For decades, their plight was ignored by successive British governments, which consistently defended the legality of both the territory’s creation and the subsequent removals. The official position remained unchanged. London resisted for decades.
Mauritius, for its part, never relinquished its claim to the archipelago. It began a long and patient campaign. The country used diplomatic channels, political forums, and international legal bodies to challenge the UK’s authority over the islands. This campaign gained unstoppable momentum in the 2010s. The turning point came at the United Nations. After decades of argument, the International Court of Justice in The Hague issued a landmark advisory opinion. The court found that the UK had not lawfully completed the decolonisation of Mauritius and that its continued administration of the Chagos archipelago constituted a wrongful act. It was a categorical legal defeat for Britain. The ruling was not binding, but its moral and political weight was enormous, leaving the UK diplomatically isolated. The pressure mounted. Faced with this judgment and growing international condemnation, Keir Starmer’s government finally conceded. In 2025, it announced that it would end its claim, cede the islands to Mauritius, and finally close a shameful chapter of British colonial history.
This fight is over a line on the map
The dispute is about water. The Maldives is not challenging Mauritian ethnic or cultural claims to the Chagos Islands, nor is it making a play for the islands themselves. Its protest is rooted entirely in a separate, pre-existing legal battle over the sea. It is a fight over a line on a map. This specific argument concerns the delineation of the Exclusive Economic Zone, or EEZ, a 200 nautical mile area extending from a country’s coastline which grants it sovereign rights for exploring and exploiting marine resources. These zones are immensely valuable. They contain fisheries, potential oil and gas reserves, and other mineral wealth. Where the zones of two nations overlap, a boundary must be agreed or adjudicated. The Maldives and Mauritius have for years been locked in precisely such a disagreement. They could not agree on a line.
Their specific dispute, over a contested area of ocean spanning nearly 100,000 square kilometres, was taken to the International Tribunal for the Law of the Sea, known as ITLOS. This is the body established by a United Nations convention to resolve these exact problems. The tribunal, based in Hamburg, heard arguments from both sides and delivered its judgment. It drew a definitive line on the map. That line became the recognised maritime border. The case appeared closed. The problem for the Maldives is that the entire legal foundation of that ITLOS ruling rested on one fundamental, now obsolete, premise. The tribunal made its calculation based on the fact that the Chagos Islands were a British Overseas Territory. The judges drew the line between the Maldives and a territory administered by the United Kingdom.
London’s 2025 agreement to cede sovereignty to Mauritius has changed everything. The legal entity to the south of the Maldives is no longer the distant UK. It is now, or will be, Mauritius. This seemingly simple transfer of ownership completely dismantles the basis of the ITLOS decision. A maritime boundary calculation involving Mauritius, a neighbouring island state, is fundamentally different from one involving the United Kingdom, a former colonial power thousands of miles away. The Maldivian government argues, with some justification, that the entire boundary must now be re-evaluated. Its fear is that a new calculation, starting from a baseline of a sovereign Mauritian Chagos, will shift the line north. That would shrink the Maldivian EEZ. It would mean a permanent loss of sovereign maritime territory. That is the fear. It explains the letter.
Burnham is caught in the middle
Andy Burnham is now trapped. The letter from the Maldivian president, sent to Downing Street on 8 September 2026, presents the new prime minister with a problem he did not create but must now solve. His predecessor, Keir Starmer, believed the Chagos issue was settled. A historic wrong had been righted. A colonial chapter had been closed. There are no easy options. To accede to the Maldivian request and reopen sovereignty talks would require unpicking the entire UK, Mauritius agreement of 2025, a complex settlement which took years of painstaking negotiation to reach. This would be a major diplomatic reversal. It would represent a profound breach of faith with Mauritius, which believed it had a final, binding deal with the United Kingdom.
This would infuriate Port Louis. Such a move would also expose the government to accusations of hypocrisy, completely undermining its stated commitment to uphold international law. London was forced to the negotiating table by the weight of successive legal defeats, culminating in damning rulings from the International Court of Justice that declared British administration of the islands illegal. Reversing course now would make a mockery of the entire process. The alternative is no better. Simply ignoring the protestations from the Maldivian president and pressing ahead with the handover would create an entirely new and volatile diplomatic problem. The Maldives is a fellow Commonwealth nation. It is a small island state which feels its legitimate sovereign rights are being compromised by a deal it had no part in.
A new grievance would be born. Ignoring Malé would be seen as the act of a dismissive, arrogant power, creating a festering and bitter dispute between two neighbouring Commonwealth members in a strategically vital part of the world. The United Kingdom would be seen as the clear architect of the conflict. This is not a quarrel in a faraway region of which Britain can easily wash its hands, because London has deep and enduring security interests in the stability of the Indian Ocean. Those interests are real.
The primary interest is concrete. It is steel and tarmac. At the very heart of the 2025 UK, Mauritius agreement were carefully worded provisions guaranteeing the future of the joint United Kingdom and United States military facility on the island of Diego Garcia. The base is a critical hub for American and British air power, projecting influence across Asia and the Middle East. Its continuous operation was the non negotiable element of the entire handover for both London and Washington. That base is vital. The deal Starmer struck with Mauritius was designed specifically to secure its future for decades, removing the profound legal uncertainty which had grown around its status on what international courts had deemed illegally occupied territory. A new three way dispute involving the Maldives throws all of that careful legal and diplomatic architecture into jeopardy. It risks creating fresh challenges to the base's operations just as its long term future appeared to have been secured. Burnham’s government now finds itself caught between honouring a predecessor's treaty, placating a new complainant, and safeguarding a critical military asset. He has no good path. Every route leads to complication.
The people who can only wait
Lost in the high diplomacy are the people who have lost the most. They are the Chagossians. Their fate was meant to be at the heart of the 2025 agreement. For the first time in fifty years, a British government had acknowledged the 'shameful' nature of their ancestors' treatment. They had been promised a future. The UK and Mauritius deal was not simply about sovereignty. It was not just about which flag flew over the atolls. The agreement contained the single most important provision of all, a funded and internationally supported right of return for the displaced islanders and their descendants. Hope had finally arrived.
This was the end of a long, bitter road. The Chagossians were a people without a home. In the late 1960s and early 1970s, the entire population was systematically and forcibly removed by the United Kingdom to clear the way for the American base on Diego Garcia. They were dumped into poverty in Mauritius and the Seychelles, a community cut adrift. For decades they fought. They fought in the British courts, they fought for British citizenship, and they fought for the simple right to set foot again on the islands where they were born. Last year’s treaty was their victory. It was the culmination of a lifetime of struggle for the community's elders, a promise that those born in exile in Crawley or Port Louis might one day see the homeland they only knew from stories. That victory now feels hollow.
The letter from Malé puts everything on hold. Indefinitely. A right of return cannot be implemented on territory whose legal status is once again subject to a complex, three way international dispute. The funds promised by the UK for resettlement, for infrastructure, for making the outer islands habitable again, cannot be released while the ultimate ownership is contested. The Chagossians can only watch. They are again the passive victims of great power manoeuvring. They waited through the Cold War. They waited through the War on Terror. They are now being asked to wait while two neighbouring states argue over the precise delimitation of an exclusive economic zone, a boundary dispute that could take years or even decades for international tribunals to resolve. Their personal histories have become a footnote to a quarrel about maritime law. They remain, as they have been for half a century, people who can only wait.
Sources. Al Jazeera: Maldives asks UK to reopen sovereignty talks over Chagos Islands. Independent UK: Maldives asks Andy Burnham to reopen talks over Chagos Islands.
Analysis. Drafted with AI assistance from the sources listed above and reviewed by an editor before publication. Jnews links to the organisations it writes about.
