Diego Garcia Military Base and British Indian Ocean Territory Bill

Nusrat Ghani Excerpts

2nd reading
Tuesday 9th September 2025 Commons Chamber

[Mr Calvin Bailey (Leyton and Wanstead) (Lab)]

I rise today not to upset a Speaker or Deputy Speaker—let us see how this goes, Madam Deputy Speaker.

[Madam Deputy Speaker (Ms Nusrat Ghani)]

Let us succeed.

[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.

[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—

[Madam Deputy Speaker]

Order. You were so close to succeeding. Let us try to get the language right.

[Mr Bailey]

I did not receive a single response from any of them, Madam Deputy Speaker.

I have mentioned colonial history, which is going to get some Conservative Members very excited and make them want to use patriotic-sounding rhetoric about the concept of sovereignty, which, as I have just explained, they do not themselves understand. I will take the issue head on. The simple fact is that despite its name, the British Indian Ocean Territory has never been British in the way that Gibraltar and the Falkland Islands are. It has never had a resident population who were British and said with one voice that they wanted to remain so. Perhaps the Chagos islanders could have had such a population if history had gone differently, but they were robbed of that opportunity when the territory was created.

I welcome the apology from the Minister earlier, and I was grateful to hear my hon. Friend the Member for Crawley (Peter Lamb) speak so powerfully about this matter. I look forward to hearing the Minister’s response shortly. Sadly, we cannot turn back the clock. What we can do is what we are doing: giving the Chagos islanders a pathway to permanent citizenship and integration here if they choose it, while supporting resettlement options within the agreement reached with Mauritius.

The absurdity of making a big song and dance about sovereignty is reflected in one simple fact. As the explanatory notes to the Bill point out, the UK has always committed to returning the islands to Mauritian sovereignty when they were

“no longer needed for defence purposes.”

That was part and parcel of the decisions made when the British Indian Ocean Territory was created. All that is happening through the treaty and the Bill is the creation of a more secure and durable solution that safeguards those defence purposes; and we are making good on our promise that the UK’s sovereignty would be continued only temporarily, not forever.

When the flag of the British Indian Ocean Territory—the flag of a tarnished endeavour—is lowered on Diego Garcia, the Union flag will be raised in its place: the flag of a modern, forward-looking nation of which Government Members are proud. By passing the Bill, we will not only address the growing vulnerability of a vital military asset, but entrench our alliances and our position in the Indo-Pacific, furthering Britain’s interests across the world.

--- Later in debate ---

[Bradley Thomas]

I will not. While the Government and the Prime Minister are trying to paint this as a good deal, they know that Beijing, Moscow and Tehran have watched closely and have all taken note.

Finally, it is not just this country’s taxpayers who recognise that this is a bad deal. Lord West of Spithead, former First Sea Lord, Chief of the Naval Staff, and Labour Security Minister, said that ceding the Chagos islands to Mauritius would be “irresponsible”, risk our strategic interests, and undermine the fundamental principles of international law. Why do the Government prioritise any interests other than Britain’s, and foreign sovereignty over that of the UK? The Bill will leave Britain poorer, weaker and exposed. It is a betrayal not just of UK interests but also of British Chagossians, and it does not deserve a Second Reading.

[Madam Deputy Speaker (Ms Nusrat Ghani)]

Order. I now call Lewis Cocking for the final Back-Bench contribution. Colleagues who have contributed to the debate should be making their way back to the Chamber.

--- Later in debate ---

[Lewis Cocking]

No, I will not give way. There have been lots of interventions, and I am fed up with the same interventions coming from the same Labour Members. Quite frankly it does not help the debate—just because they say something several times does not make it true.

The Bill is costing us financially, but it also has security risks. China supports the deal and is welcoming Mauritius into its sphere of influence with open arms. Mauritius is strengthening relations with Iran and Russia. As a Policy Exchange report notes, it is impossible to assert with certainty how much influence China will have over Mauritius in the next five or 10 years, let alone for the 99-year duration of this lease.

We already have British sovereign territory with a base, so I cannot understand why we have done that negotiation, and why we are hurting the British people with tax rises. As I said, we are being cruel to older people by taking away their winter fuel allowance, going after farmers with the family farm tax, and going after British businesses with the increase to national insurance contributions, yet we can find money out of nowhere—£35 billion—to give to Mauritius.

In summary, I gently say to the Government that people out there know that. When we knock on doors, as I am sure we all do across our constituencies, people will say to us, “Hang on a minute. How come we are being punished? How come we have to pay more taxes, but you soon find money when it suits you?” That is why the British public have fallen out of love with this Government already. Hopefully the Government will wake up and start representing the people who they were elected to represent in this Chamber: the British public, not foreign Governments such as that of Mauritius.

[Madam Deputy Speaker (Ms Nusrat Ghani)]

I call the shadow Minister.