Diego Garcia Military Base and British Indian Ocean Territory Bill

Debate between Calvin Bailey and John Hayes

2nd reading
Tuesday 9th September 2025 Commons Chamber

[Mr Bailey]

Thank you, Madam Deputy Speaker.

I am proud to speak in favour of the Bill. I do so as a proud former member of our armed forces, having devoted 24 years of my life in uniform to the safety and security of this nation, particularly in intelligence gathering, where UNCLOS is a tool of the trade. That experience shapes my view of the Bill. I find it rich to hear lectures on national security or faux patriotism from the right hon. Member for Witham (Priti Patel), whose party spent 14 years hollowing out our armed forces.

The Bill exemplifies the forward-looking, effective and patriotic approach that this Government have taken to our security and our place in the world. It is a major achievement to be implementing an agreement that will ensure that our base on Diego Garcia can operate securely in conjunction with our allies—notably the US—until at least 2124.

[Sir John Hayes]

Will the hon. Gentleman give way?

[Mr Calvin Bailey]

Not yet.

Allied naval, aviation and communications assets will be able to protect UK interests across a vast area of the western Indian ocean and beyond throughout the next century, no matter the change, turmoil or insecurity that the coming decades may bring.

The agreement provides the UK and our allies with the freedom of action necessary to guarantee the security of the base. This is detailed in a great many ways by the treaty, but I will highlight just three. First, we will have joint control over the electromagnetic spectrum communications and electronic systems. Secondly, we will have joint control over whether any security forces—military or civilian—will be permitted, except for our own and those of the United States and Mauritius. Finally, we will have joint control over any land development and any construction of sensors, structures or installations at sea. These are very broad and flexible rights; they apply not just to Diego Garcia, the 12-mile boundary within which territorial sovereignty extends or the 24-mile boundary surrounding it, but to the entire Chagos archipelago of 247,000 square miles.

What the Opposition have missed is that it is not what UNCLOS precludes but what it allows that is the threat. When it comes to the activities of third parties, control will be joint between the UK and Mauritius. This joint control will give us the ability to veto decisions if, after engaging fully with our Mauritian partners through the joint commission, we are ultimately unsatisfied about the security risks in a way that we cannot now. Within 12 miles of Diego Garcia, our control will be unrestricted, not joint; the same will apply to our rights, and those of US forces, to access Diego Garcia by air and sea. This will deliver the control that our armed forces need to keep the base secure over the decades to come.

In achieving the agreement, we have bolstered our relationships with key allies and partners, including India, as I will come to later, but first and foremost with the United States. It is a shame that the right hon. Member for Tonbridge (Tom Tugendhat) has left the Chamber, because I have some questions for him.

We need to be clear about the games that Opposition parties have been playing over this issue. Reform and the Conservatives have attempted to undermine this agreement at every stage, damaging UK interests and trying to drive a wedge between the UK and our allies. We saw the same approach from the hon. Member for Clacton (Nigel Farage) in his anti-UK PR campaign on Capitol Hill last week, and I note that I can see none of the Reform party present.

As I have told this House from personal and professional experience, the United States military and its allies value written agreements and long-term guarantees. Our allies rely on the same kind of lease agreements to underwrite their own bases, so they see that this model can stand the test of time despite huge geopolitical shifts, and all of us can see that too.

The right hon. Member for Tonbridge said that we should save the base for our unilateral action, but he did not once explain how we would pay for operating and maintaining a base unilaterally. Instead of recognising the benefit of these negotiations, as a way to bolster our cross-Atlantic alliances and increase the value of our contribution to Indo-Pacific security, the Conservatives have repeatedly tried to undermine the process that they themselves started. Thankfully, they have failed. Our international partners have welcomed this agreement, and it now falls to us to ensure that the necessary changes are made in law so that the treaty can come into force and we do not let down our allies.

By far the strongest international advocate for this treaty is India. India is, as we know, an utterly indispensable partner in ensuring that the region remains free and open for navigation and UK trade. India is already a geopolitical force to be reckoned with, and her power and importance as a balancer preventing Chinese domination will only grow over the decades to come. The continuation of the UK and US forces on Diego Garcia, while resolving the question of sovereignty, aligns our strategic interest more strongly with India’s and helps to counter anti-UK rhetoric from the likes of Russia, which can still have influence by playing on the legacy of the anti-colonial struggle. The Conservatives conceded that by starting negotiations about sovereignty. I have asked them all repeatedly about that, and not one of you—