There is a growing and worrying misunderstanding in Reform UK about the Chagos Islands, one that risks turning patriotic instinct into strategic self-harm.
Reform UK has begun repeating a simple and crowd-pleasing line: “A Reform government would reject the deal to transfer sovereignty to Mauritius.” It sounds robust. It sounds patriotic. It sounds decisive. It is also dangerously incomplete.
The problem is not the instinct to oppose Labour’s Chagos deal. That instinct is right. The problem is pretending that once the treaty is signed and ratified, Britain can simply walk away later without catastrophic consequences. That is not how international law works, and it is not how this treaty is written.
China understands this perfectly. That is why Beijing would welcome nothing more than Britain sleepwalking into this agreement.
Under the small print of the Chagos treaty, sovereignty passes to Mauritius, and Britain becomes a paying tenant on Diego Garcia. Payments are not a courtesy. They are a condition. If Britain defaults, repudiates the treaty, or unilaterally “rejects” it after ratification, Mauritius gains powerful legal and diplomatic leverage. At that point, disputes are no longer political arguments in Westminster. They become international proceedings, with Britain cast as the party in breach.
That is the moment China is waiting for.
Beijing does not need to invade Diego Garcia. It does not need to fire a shot. All it needs is a legal pretext, a dispute, a rupture between allies, and a friendly sovereign power in control of the territory. A missed payment, a rejected obligation, or a future government declaring the deal void would hand China exactly the opening it wants: a chance to argue, on the international stage, that the US and UK have no lawful right to remain.
This is not speculation. It is how modern great-power competition works. Lawfare is the weapon.
China’s objective is simple: to weaken Western military reach in the Indian Ocean and Indo-Pacific without triggering a direct conflict. Diego Garcia is one of the most important bases on the planet. It is THE most important in the Indian Ocean. Disarming the West there would shift the balance of power across half the globe. Beijing would be delighted if Britain did the work for it.
Remember Mauritius is heavily indebted to China.
This is why the current Reform slogan, however well-intentioned, misses the point. The most dangerous moment is not before the treaty is ratified. It is after. Once sovereignty is transferred, Britain’s options collapse. A future government cannot just tear it up without triggering precisely the crisis our adversaries want.
Nigel Farage understands this. I have spoken to him about it. He grasps that the real fight is now: stopping ratification, forcing delay, exploiting the judicial review, and pressing allies, especially the United States, to intervene before the point of no return. That is the only safe route.
So why is this not cutting through?
When Richard Tice and Danny Kruger, both of whom I respect and like, say that a Reform government would simply reject the deal, it reassures patriots but misleads them. It implies there is a clean escape hatch later. There isn’t. By the time a future government takes office, the damage will already be done. Unless we stop it now.
This is not about scoring points. It is about preventing a strategic catastrophe.
The correct message is not “we will tear it up later”. The correct message is “this deal must never be ratified”. Those are not the same thing. One deters China. The other invites it to wait.
Labour’s Chagos policy is reckless because it gives away sovereignty, loads the taxpayer with a £35 billion bill, ignores the Chagossian people, and jeopardises Western defence. But the response must be equally serious. Empty bravado after the event is worse than useless. It is dangerous.
This is how great powers stumble into wider wars: not through intent, but through miscalculation, legal traps, and the illusion that they can fix tomorrow what must be stopped today.
Reform UK is right to oppose the Chagos deal. But it needs to say the right thing, at the right time, for the right reason.
Wake up. Stop the deal now, or accept that others will decide the future of Diego Garcia for us.
By Claire Bullivant, CEO, Great British PAC
