UK defends Chagos deal as Trump attacks Diego Garcia

Let’s start with the facts. The UK says it will not compromise on national security after President Donald Trump called the Chagos agreement “great stupidity” and “total weakness” on Truth Social. Signed in May 2025, the deal transfers sovereignty of the Chagos Islands to Mauritius while the UK retains a 99‑year lease on the joint UK–US base at Diego Garcia. Ministers put the average lease payment at about £101m a year, with a net cost of £3.4bn over the term. (cbsnews.com)

Why is this flaring now? Downing Street says the US still supports the arrangement, pointing to comments last year from Secretary of State Marco Rubio welcoming the signed deal because it secures the long‑term operation of the base. The government also highlights public backing from Five Eyes allies and partners including India, Japan and South Korea. (euronews.com)

What exactly has been agreed? Think of two parts: first, the UK recognises Mauritian sovereignty; second, it leases Diego Garcia back for decades so the base keeps running. UK and media briefings say the treaty includes a UK veto on development, a ban on foreign forces and a security exclusion zone around the base. (apnews.com)

Why do this at all? International law has moved against the UK’s old position. In 2019 the International Court of Justice advised that Britain must end its administration of the archipelago “as rapidly as possible.” Soon after, the UN General Assembly voted 116–6 to demand withdrawal within six months. That legal pressure sits behind today’s political choices. (icj-cij.org)

Trump’s post matters because the base is central to US power in the Indian Ocean. He linked the Chagos deal to his push to acquire Greenland and framed the UK move as weakness. Yet in February 2025, during an Oval Office meeting, he said he was inclined to go along with the UK, and Washington later said it “welcomed” the accord once it was signed. (cbsnews.com)

Where are we in Parliament? The Diego Garcia Military Base and British Indian Ocean Territory Bill has completed scrutiny in both Houses and is in its final stages, with the Lords registering concerns in a symbolic “regret” motion but allowing the legislation to proceed. This is the process that turns a signed treaty into UK law. (bills.parliament.uk)

If you teach politics or law, here’s the quick map. A treaty goes through negotiation, signature, parliamentary scrutiny and then ratification. MPs and peers cannot usually rewrite the text, but they can pass implementing laws and attach oversight and cost controls. The House of Commons Library sets this out in its briefings. (commonslibrary.parliament.uk)

What does the base actually do? Diego Garcia has a long runway and deep‑water port supporting intelligence, logistics and long‑range air operations towards the Middle East, East Africa and Asia. The Ministry of Defence lists functions from nuclear‑test monitoring equipment to GPS ground stations; its role has included support to operations in Afghanistan and Iraq. (wired-gov.net)

Chagossian voices must be central. Two women born on Diego Garcia, Bernadette Dugasse and Bertrice Pompe, brought a legal challenge to halt the handover, arguing they were excluded from talks and want the right to return. After an injunction was lifted, Pompe called it “a very sad day” and vowed to keep fighting. (itv.com)

Mauritius’ stance is clear: leaders point to the ICJ opinion and the UN vote, say sovereignty is already recognised in international law, and present the treaty as completing decolonisation. Port Louis has pledged resettlement on islands other than Diego Garcia. (press.un.org)

What British ministers argue: a string of court rulings had eroded the UK’s legal position and, without a settlement, the base’s future risked being hobbled. They say the treaty hard‑codes protections to keep adversaries out while locking in allied access for generations. (itv.com)

Politics continues around it. Conservative leader Kemi Badenoch calls the payments “self sabotage.” Nigel Farage says Trump has “vetoed” the plan. Liberal Democrat leader Sir Ed Davey argues ministers should stand up to Washington. Labour MP Emily Thornberry calls Trump’s volley “presidential trolling” and says we should take him seriously but not literally. (yahoo.com)

For classrooms, here’s how to read competing claims. Separate three questions: What does international law say? What does the treaty text require? Who gets a say in resettlement and oversight? You can ask students to track those strands through official documents and trusted reporting before forming a view on fairness and security. (icj-cij.org)

One final media‑literacy note on the price tag. You’ll see both £101m a year and about €120m a year reported, plus a UK “net” figure of £3.4bn over 99 years. That’s because different briefings use averages, indexation and currency conversions. Always check whether a number is nominal, indexed or a net‑present estimate. (itv.com)