Today the Conservative and Reformer Post speaks with Christopher Howarth, a senior parliamentary advisor and leading voice in the debate over the future of the Chagos Archipelago.
As the Labour Government prepares to bring legislation to Parliament that would hand sovereignty of the Chagos Islands, including the crucial Diego Garcia base, to Mauritius, we explore the risks, the politics, and the £30 billion price tag. Christopher, thank you for joining us.
Christopher Howarth: Pleasure to be here.
Q: Let’s start with the basics. What is this agreement with Mauritius, and why is it so significant?
CH: In May, the UK signed an agreement to transfer sovereignty of the entire Chagos Archipelago, including Diego Garcia, to Mauritius. This isn’t a minor diplomatic shuffle. Diego Garcia is home to one of the most strategically important military bases in the world, jointly operated by the UK and the US. What the government has signed up to is a 99-year lease arrangement—where the UK would continue operations but under Mauritian sovereignty.
It’s not in force yet—thankfully. For the UK, it still requires an Act of Parliament, likely coming in the Autumn.
Q: What’s wrong with this deal? Doesn’t it settle an old colonial grievance?
CH: That’s the narrative being pushed—but it’s deeply flawed. First, the Chagos Islands were never part of an independent Mauritius. They were detached in 1965 while both territories were still British colonies. There is no historical basis for this so-called “return.” The link to Mauritius was administrative only—like being managed from London versus Edinburgh.
Second, this isn’t just about history. This deal jeopardises UK and US security interests. The agreement imposes multiple new obligations on the UK—obligations to inform Mauritius about military actions, reveal the location of sensitive equipment, and even employ Mauritian contractors on the base. It also introduces Mauritian environmental regulations. All this weakens operational secrecy and control.
Q: Some say we should comply with the 2019 ICJ advisory opinion. What’s your response?
CH: The clue is in the term: advisory. The ICJ ruling came from a non-binding General Assembly resolution. It has no legal force. Moreover, the UK has an explicit exemption from ICJ jurisdiction when it comes to disputes with Commonwealth states—Mauritius is one of them. There’s no international court that can force the UK to give up Chagos. This is a political decision—not a legal requirement.
Q: You’ve said this deal puts taxpayers on the hook for £30 billion. Where does that figure come from?
CH: It’s the combined cost of the lease payments, the new trust fund for Mauritius, annual economic development aid, and associated military and legal risks. That money comes from the Ministry of Defence and the Foreign Office—not new money, but money cut from core defence and diplomatic priorities. We’re slashing our own capabilities to pay Mauritius for something we already own.
Q: What about the Chagossians themselves—those who were displaced? Isn’t this agreement meant to address their concerns?
CH: That’s another illusion. The Chagossians overwhelmingly hold British Overseas Territories passports. Many live in the UK. They do not support returning to Mauritian rule. Historically, they are a Creole population with poor treatment under Mauritius. If anything, this agreement ignores their rights and preferences in favour of placating an overseas government.
Q: And what about the security risks? How serious are they?
CH: Let’s be blunt. Diego Garcia is not just any military outpost. It is a keystone in Western military architecture in the Indo-Pacific. This deal puts operations under a host of new restrictions: Mauritius can block actions through legal and environmental channels. It has to be informed of military strikes. Sensitive equipment locations have to be disclosed. The Pelindaba Treaty, which Mauritius is party to, bans nuclear weapons—creating a legal grey area for US nuclear operations.
And let’s not forget China. Mauritius is part of the China-Africa Cooperation Forum. This deal creates an opening—diplomatic and legal—for China to apply pressure. The outer Chagos islands could see Chinese-backed fishing fleets or surveillance ships with impunity if they’re no longer covered by British sovereignty.
Q: So what is the alternative? What should the UK government be doing instead?
CH: It’s simple: stay the course. The UK has legal sovereignty over BIOT. We operate the base with US support. Nothing obliges us to give that up. Continuing as we are ensures security, maintains a consistent foreign policy line, and avoids sending a signal to the world that Western powers can be diplomatically pressured into giving up strategic assets.
Surrendering the Chagos Archipelago now—particularly Diego Garcia—would be a precedent of weakness, not reconciliation.
Q: Some might argue the 99-year lease offers long-term security. Isn’t that enough?
CH: Absolutely not. Sovereignty is permanent; a lease is not. What happens if a future Mauritian government changes tack? They could re-litigate the issue at the ICJ, renegotiate terms under pressure from foreign powers, or simply revoke parts of the agreement. The US already had to move surveillance operations out of Seychelles due to political change. We’re setting ourselves up for the same vulnerability here.
Q: Final question—what’s your message to Parliament as they consider this deal in the Autumn?
CH: Vote it down. This is a bad deal for UK taxpayers, a dangerous shift in global precedent, and a security risk for both the UK and our closest ally, the United States. We are handing over sovereign territory, undermining decades of defence strategy, and paying Mauritius billions for the privilege.
It’s not decolonisation—it’s capitulation. And Parliament should reject it.
Interviewer: Christopher Howarth, thank you for your time and your clarity.
CH: Thank you. Let’s hope common sense prevails.
