Britain Ripped Chagos From Mauritius and Is Now Trying to Keep It

Britain has spent more than half a century treating a group of Indian Ocean islands as its own private property. Now it is reconsidering the one deal that might have ended that theft, and the reason is not justice, not international law, and not the wishes of the people it displaced. The reason is that Donald Trump called the agreement "terrible" at the United Nations General Assembly, and London decided that Washington's opinion mattered more than its own treaty.

Ask yourself what kind of government does this. A government that signs a deal with a sovereign state, announces it to the world, and then retreats the moment a foreign president frowns. This is not diplomacy. It is a country that has forgotten what it claims to stand for.

Start with the facts, because the facts are damning. In 1965, while Mauritius was still a British colony approaching independence, the UK detached the Chagos Archipelago and created the British Indian Ocean Territory. Mauritius was granted independence in 1968 without its territory. Between roughly 1967 and 1973, the British government forcibly removed the Chagossian people from their homes so that the largest island, Diego Garcia, could be turned into a military base. Estimates of those displaced range from about 1,500 to 2,000 men, women, and children. They were loaded onto ships and dumped in Mauritius and the Seychelles. Many lived in poverty for decades. Some were told they could never go home again.

This was not an accident of history. It was a deliberate act of dispossession, carried out by a colonial power against a people who had no vote, no lawyer, and no voice in Whitehall.

The International Court of Justice reviewed the case and, in its February 2019 advisory opinion, found that the UK's continued administration of the Chagos Islands was unlawful and that the decolonisation of Mauritius had not been completed lawfully. That same year, the UN General Assembly passed a resolution demanding the UK withdraw its colonial administration within six months. It passed with 116 votes in favour and six against. The world did not whisper its verdict. It shouted it.

And what was Britain's answer? Years of delay, legal manoeuvring, and a slow-moving negotiation that only reached a treaty in 2025. Under that agreement, the UK would have recognised Mauritian sovereignty over the islands while leasing back Diego Garcia for the joint UK-US base, at an average cost of around £101 million a year. That is not generosity. It is a rent payment that acknowledges whose land it is. It is the closest thing to justice the Chagossians have been offered in their lifetimes, and even that was not enough for the politicians in London who spent their careers defending the old imperial arrangement.

Now the deal wobbles, and the message to every small state watching is brutally clear: your sovereignty is valid only when a great power approves of it. Mauritius has done everything right. It is one of Africa's most stable democracies. It has held regular, competitive elections, transferred power peacefully for decades, and built one of the continent's most respected records on governance and economic openness. Its people have done what the international system asked of them. They went to the courts. They went to the UN. They waited. And they are still being asked to wait longer.

Let us be fair to the critics. There are serious arguments about the strategic value of Diego Garcia and the importance of the base to Western security. Those concerns deserve a serious hearing. But strategic convenience cannot be the basis for denying a democracy its territory. If the base matters so much, then negotiate its future in good faith with the sovereign owner. Do not treat the owner as a tenant who can be evicted whenever the landlord changes his mind. A security argument can justify a lease. It cannot justify a theft.

This is the pattern across the continent, and we should name it without apology. Britain, like France before it and like other powers today, claims to champion the rules-based order when it suits them. They lecture African governments about corruption and democratic backsliding. Yet when those rules limit their own freedom of action, they discover that the rules were always negotiable. Meanwhile, China, Russia, the UAE, Turkey, and others have their own Africa strategies, built on ports, mines, arms, and loans, and they are often less embarrassed to admit that their interest is extraction. The lesson for Africans is not that every outside power is the same. It is that every outside power will hold us to its own standards only when it has to, and that our own governments must be strong enough to insist on those standards without waiting for permission.

So what should happen? First, the UK must honour the ICJ opinion and the 2019 UN resolution in full. Not partially, not after another round of consultations, not when Washington feels comfortable. The rule of law is either applied to the powerful or it is decoration. Second, any settlement must put the Chagossian people at the centre, with a real right of return, proper compensation, and a voice in the future of their homeland. Britain has paid compensation before, but it has never given the Chagossians the dignity of being full participants in deciding their own destiny. Third, the United States, as a partner in Diego Garcia, must stop treating the base as a lever in a bilateral bargaining game and accept that the sovereign of the territory has rights that a base lease cannot erase.

Mauritius should also be supported, not just cited. African institutions, including the African Union, should stand openly behind Mauritius's sovereignty claim and call the colonial detachment what it was: an unlawful act that Africa will not forget. Civil society, lawyers, and diaspora groups in London and Port Louis should keep the Chagossian case alive in courtrooms and newsrooms so that the story does not disappear the moment the diplomatic cameras turn away.

And citizens? You have a role. Ask your own government, and your own parliament, whether it is willing to defend the principle that colonial-era dismemberment must be reversed. Ask your journalists why a 1965 act of theft is still being litigated in 2026. Ask your leaders why they are willing to lecture Africa about democracy while they negotiate away the sovereignty of a democratic African nation to suit a foreign capital.

The Chagos Islands are small in size but enormous in meaning. They are a test of whether the countries that preach law and self-determination actually practise either one. Britain is failing that test in plain sight. We should not let it fail quietly.

Based on reporting by BBC