The proof is now in the public record.
It sits in Hansard. It sits in written parliamentary answers. It sits in formal treaty declarations lodged years ago and reaffirmed only months ago.
When those pieces are placed side by side, one conclusion follows: Parliament was misled about the legal threat said to justify Keir Starmer’s Chagos surrender.
The Moment Everything Turned
On 22 May 2025, the day the Treaty with Mauritius was signed and first presented to the House of Commons, Defence Secretary John Healey laid out the case for urgency.
He warned that “within weeks we could face losing legal rulings, and within just a few years the base would become inoperable”.
He did not speak vaguely. He identified the source of danger.
It was the International Tribunal for the Law of the Sea, ITLOS.
House of Commons Video: Labour Defence Secretary John Healey explains why the Treaty is necessary: https://youtu.be/0Q_klwRDf-k
House of Commons Video: James Cleverly asked John Healey what body has jurisdiction to close the base: https://youtu.be/ZzM0yaXK94A
House of Commons Video: Sir Julian Lewis puts Healey on the spot after he ducked James Cleverley’s question. Healey responds with the killer statement: https://youtu.be/PXUVcr0l0s4
John Healey can clearly be heard describing ITLOS as “the most proximate, and the most potentially serious” legal threat. He ruled out the International Court of Justice and the International Telecommunication Union as the decisive risk. ITLOS, he said, was the problem.
That statement created the sense of immediate peril. It framed the Treaty as necessary to prevent operational collapse at Diego Garcia. MPs were told delay was dangerous. The base, one of the most strategically important installations in the world, was at risk.
Everything that followed rests on that assertion.
The Legal Architecture
ITLOS operates under the United Nations Convention on the Law of the Sea, UNCLOS.
UNCLOS contains Article 298, a provision that allows states to exclude certain categories of disputes from compulsory dispute settlement. These include disputes concerning military activities and, crucially, disputes that would require a tribunal to determine sovereignty.
The United Kingdom made an Article 298 declaration in 2003. It reaffirmed its position in 2020.
That matters because UNCLOS tribunals do not determine sovereignty where Article 298 has been invoked. This principle was reflected in the 2015 arbitration concerning the Chagos Islands, where sovereignty was treated as beyond the tribunal’s jurisdiction.
In short, ITLOS is not a sovereignty court.
The Written Answer That Changes the Landscape
On 12 February 2026, Conservative MP Sir John Hayes asked the Foreign Office what guidance it provided regarding the impact of Article 298 on British maritime logistics in Overseas Territories.
The reply, from Seema Malhotra, was unequivocal.
The United Kingdom’s position regarding Article 298 remains as set out in its formal declarations of 7 April 2003 and 31 December 2020.
There has been no withdrawal. No amendment. No dilution.
The exemption stands.
That confirmation is not commentary. It is a formal written answer to Parliament.
The Contradiction
Here is the irreconcilable tension.
On 22 May 2025, Parliament was told that ITLOS posed the most proximate and potentially serious threat to the operability of Diego Garcia, and that adverse rulings could arrive within weeks.
On 12 February 2026, Parliament was told that the UK’s Article 298 declaration remains unchanged.
If Article 298 remains active, then ITLOS cannot adjudicate sovereignty. It cannot strip the United Kingdom of control over the Chagos Islands. It cannot issue a sovereignty ruling that forces the base to close.
Ministers did not present this as a matter of diplomatic discomfort or political pressure. They presented it as a legal risk of rulings, imminent rulings.
If the legal structure makes such rulings impossible in the form described, then the House was given a materially misleading impression of the threat.
That is not a partisan observation. It is a logical one.
What This Does and Does Not Claim
This is not an argument that there was no international pressure. There clearly has been sustained diplomatic and political scrutiny over Chagos.
Nor is it an argument that governments cannot take pre-emptive action for geopolitical reasons.
It is a narrower, more serious point.
Parliament was told that ITLOS was the proximate legal danger, that rulings could arrive within weeks, and that those rulings threatened operability. The Government’s own written answer confirms that the UK’s Article 298 shield remains fully in place.
Those two positions sit uneasily together.
If ministers believed Article 298 did not neutralise the threat, they should explain why. If they believed it did, they should explain why ITLOS was presented as an imminent operational danger.
Until that explanation is provided, the conclusion is stark.
Parliament voted on the basis of a legal urgency that the Government’s own documentation now calls into question.
The Necessary Next Steps
The documents are public. The quotations are clear. The legal declarations are on record.
Parliament should now:
- Require the Government to publish the legal assessment underpinning the claimed ITLOS risk.
- Clarify whether Article 298 was considered sufficient protection at the time ministers warned of imminent rulings.
- Pause further legislative progress until the contradiction is addressed openly.
This is not about relitigating history. It is about safeguarding constitutional integrity.
When ministers warn of imminent international rulings that threaten national security infrastructure, Parliament must be able to trust that those warnings are legally grounded.
The record now demands explanation.
Until that explanation is given, the unavoidable conclusion remains: the House was misled about the immediacy and nature of the legal threat used to justify the Chagos agreement.
