Diego Garcia Military Base and British Indian Ocean Territory Bill

John Hayes Excerpts

2nd reading
Tuesday 9th September 2025 Commons Chamber

[Sir John Hayes (South Holland and The Deepings) (Con)]

Will my right hon. and learned Friend give way?

[Sir Jeremy Wright]

I give way to my fellow Committee member.

[Sir John Hayes]

I am extremely grateful to the former Attorney General for giving way. He is right to say that the matter could have been—and still could be, as I think he will also want to confirm—brought to our Committee. If, even at this late juncture, an overture were made to our Committee—clearly, it would have to be discussed at Committee—it would be perfectly possible for the Government to set out in those terms the advice they received that legitimises the position that they have taken.

[Sir Jeremy Wright]

My right hon. Friend makes a good point. Although all our hearings are held within closed doors, he is right that until that happens, our door is open. There is an opportunity for the Minister, if he wishes to take it, to make that proposal.

Let me come back to the point that the hon. Member for Leyton and Wanstead (Mr Bailey) made. His rejoinder and the rejoinders of his colleagues and Ministers have always been the same throughout this debate. They say, “The last Government began negotiations on this, so clearly the last Government accept the same logic that we accept.” That simply will not do. As Ministers and the Back Benchers behind them have been very keen to point out, the last Government had 11 rounds of negotiation on this question. If they had chosen to do the deal that this Government have done, they had ample opportunity to do it, but they did not. That can only be because they did not believe it was the right deal to do.

This Government are undoubtedly enthusiastic about getting swift resolution of disputes—it seems that they apply the same principles to labour disputes—but settling a negotiation fast is really very easy if we give the person with whom we are negotiating everything they want. What Mauritius wanted out of this negotiation was sovereignty over the entire Chagos archipelago, and that is what this Government have given them. I am afraid that we really cannot award any points for the fact that this Government have managed to resolve this issue more swiftly. The fact that the Government of which some of us Conservative Members were part did not resolve it that quickly is perhaps because they were not prepared to give ground on that particular issue.

We need an explanation of why the Government feel it is necessary to do this deal. We need an explanation on what precisely the legal jeopardy they face is and what its origin is, and we need to know what the binding legal judgment they fear is. Frankly, without those explanations, this House should not be asked to agree to this Bill or this treaty.

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[Paul Holmes]

I will tell the hon. Gentleman what one of those red lines was: not paying £35 billion to another country. In case he wants to read his Labour party briefing again, I remind the hon. Gentleman that another red line for the last Foreign Secretary was that he clearly did not accept unilaterally that the sovereignty of the Chagos islands fell with Mauritius. That is a key difference between the last Government and this Government.

This is a bad deal for Britain: it will cost £35 billion, while the Government tax and spend and make people in this country poorer, and in an ever-changing international security situation, this country is unilaterally giving up a strategically important defence base, in an area of the world where we are seeing more geopolitical uncertainty. I cannot put into words how bad this Bill is, except to say that it is an act of self-sabotage that we have not seen in this House by a democratically elected Government for generations.

To reiterate, not only is this a bad deal, but it is backed by every nation that is malign to our national interest, including China, Russia and Iran. Last week, at an international summit, those countries were actively advocating some of the malign influences about which this Government and the last Government spoke about, and they are actively backing this deal. I challenge Labour Members to look Opposition Members or any of their constituents in the eye and say that a deal that is successful for this country should be backed by Iran, China and Russia.

Madam Deputy Speaker, I am trying to work within the confines of parliamentary etiquette, but I have to say that there is something deeply concerning about the way that this Government have chosen to negotiate the terms of the agreement. We have to look at the close links between the key people who negotiated this deal with the Mauritian Government and the links—private links—to the Prime Minister and Ministers in this Government. The Prime Minister of Mauritius has said in the Mauritian Parliament that officials were asked to leave the room while private negotiations were going ahead. I have never known a responsible Government who are trying to hand over sovereignty of a British overseas territory to ask officials, who are there to protect the integrity and the transparency of the of decisions that Ministers take, to leave the room so that a negotiation can go on. Why have the Government hidden the cost of the deal? Why have they refused to give this House a solid and sustainable way to scrutinise the decisions of the Government? They have avoided scrutiny at every turn.

[Sir John Hayes]

Perhaps I can invite my hon. Friend to be helpful to the Minister. He clearly holds him in some regard, and he is right that he has got himself into something of a mess. By far the best way for the Government to proceed from hereon would be to make much more available either to this House or, as the former Attorney General, my right hon. and learned Friend the Member for Kenilworth and Southam (Sir Jeremy Wright) suggested, to the Intelligence and Security Committee. That would clarify the terms of this trade—why it happened and the assessments that were made that led up to it—in a way that the House would be able to either legitimise what the Minister claims or refute it. A lack of transparency is half the Minister’s problem.

[Paul Holmes]

I agree with my right hon. Friend. I found it quite concerning earlier that the Chairman of the Defence Committee, the hon. Member for Slough (Mr Dhesi), relied on the fact that American counterparts in an Administration that he does not scrutinise backed the deal, so there was no need for the Defence Committee to interrogate Ministers of the Government it is supposed to scrutinise. There have been two offers this afternoon, one by my right hon. Friend the Member for South Holland and The Deepings (Sir John Hayes), and the other by my right hon. and learned Friend the Member for Kenilworth and Southam, in his expert speech. There is a scrutiny structure in this House called the Intelligence and Security Committee to which the Minister could refer this decision, and he can rest assured in the knowledge that there are expert Members across the whole House who could offer their expert opinion on the deal. The Government have chosen not to do that. That is an indictment of the transparency and the drive the Government have shown in getting the deal very quickly.

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[Tim Roca]

I believe that the hon. Member has had quite a lot of turns today, and I have been waiting a long time without intervening, so I will proceed. If we allowed a vacuum to be created, it would be filled by China or others in a region that is vital to our security. I will come back to China in a moment, because what China thinks about this treaty is important as well.

Turning to the first test, the treaty secures 99 years of guaranteed access, with the option to extend it by a further 40 years; 99 years was good enough for Lord Salisbury, so it is good enough for me. It gives us full operational control over installations, logistics, communications and the electromagnetic spectrum. It establishes a 24-nautical-mile buffer zone and bans any foreign military presence on the outer islands. We have talked about how it protects a unique maritime environment and provides tangible support through the trust fund for Chagossian communities. On the first test I am satisfied.

On the second test—whether the agreement commands the backing of allies and experts—other colleagues have spoken powerfully about this, but Lord Goldsmith, a former Attorney General, said it was

“consistent with our national security interests and with our respect for international law”.

The international support is equally strong. Australia’s Kevin Rudd called it a

“good outcome for Mauritius, for Australia, for the UK and for our collective security interests”.

Canada’s foreign ministry said that it ensures

“the long-term, secure and effective operation”

of the joint base, strengthening a free and open Indo-Pacific.

In the United States, where there is not much that gets bipartisan support, it is a bipartisan matter. Antony Blinken said that America “strongly supported” the negotiations. Secretary of State Marco Rubio commended the “leadership and vision” shown. The Democratic former Defence Secretary Lloyd Austin said that the agreement will

“safeguard strategic security interests into the next century.”

I believe an hon. Member has already quoted President Trump, who described it as an amazing deal, a beautiful deal or whatever kind of deal—but a good deal, that is the main point.

The international consensus is clear. Our allies, partners and experts back the deal. I was very taken by the comments of Professor Benjamin Sacks of the RAND school of public policy in the United States. He said:

“I contend that Beijing privately views the agreement, even if modified to ameliorate some Chagossians’ outstanding demands, somewhat as a setback. In practical terms, it gains little if any advantage from it.”

He added:

“The Chagos issue constituted a perennial problem for British foreign policy; one that China could simultaneously exploit to demonstrate its supposed adherence to existing RBOs”—

rule-based orders—

“and undermine the UK’s traditionally important role in maintaining it.”

He also said that the deal deters Port Louis—Mauritius—from becoming an effective client state of Beijing. On the point of whether our allies support it, I believe that the treaty meets the test.

[Sir John Hayes]

Will the hon. Gentleman allow an intervention?

[Tim Roca]

I will not. I experienced the right hon. Gentleman defending the hereditary principle last week, and I do not think I have the strength in me this week to listen to another argument.

The final test was on costs and obligations. Again, Ministers have talked powerfully about the deal being less than 0.2% of the defence budget. Comparisons have been made with what the French are paying in Djibouti, and I am glad that we are getting a better deal than the French. Of course, Diego Garcia is 15 times larger than those bases and in a more strategic location. The treaty gives us immense operational freedom. It therefore seems to me that this is a modest investment for an irreplaceable asset. The risks from delay or abandonment—in this argument, we have to balance the treaty with the risks of what could happen—are vastly greater.

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[Alex Ballinger]

I go back to the example of RAF Gan. The Maldivians refused the Soviet Union back in 1976, because the UK had a good reputation with them. We honoured our agreements and respected international law, and they felt that it was inappropriate for them to be seen to be supporting a country that had not done the same.

In the case of Diego Garcia, this is a situation that has been negotiated for many years. The Conservatives recognised that there was a threat to our sovereignty, because they started the negotiations. As we have heard from my hon. Friends, if we are unable to conclude a deal soon, there is a serious risk that our operations at the base would be thwarted. It would not be in 99 or 140 years after the deal; it would be in weeks or months.

[Sir John Hayes]

Will the hon. Gentleman give way?

[Alex Ballinger]

I will carry on for a moment, and then I will give way.

Despite the risks, the Conservatives have come out in opposition to this deal. The right hon. Member for Braintree (Sir James Cleverly)—the former Foreign Secretary, who is not in his place—has described the deal as “weak, weak, weak”, but it was he who started the negotiations back in 2023. He pledged that he would complete the deal in the same year, but he was unable to do so. Maybe it was his negotiating tactics that were “weak, weak, weak”, rather than anything else. For all the Conservatives’ complaining about this agreement, they have failed again to offer any insight into why they started the negotiations in the first place.

[Sir John Hayes]

The hon. Gentleman is right. Questions about why the negotiations started have been raised by my right hon. Friend the Member for Tonbridge (Tom Tugendhat), given that the national interest is the primary concern of all responsible Governments and could easily be compromised by this deal, but will the hon. Gentleman deal with this point? It has been made absolutely crystal clear in this debate that Lord Cameron, when he became Foreign Secretary, ended those negotiations. Lord Cameron is a man of immense experience, who has probably negotiated at a level beyond anyone present in this Chamber. He would have certainly taken legal advice within the Foreign, Commonwealth and Development Office before he closed those negotiations. Why does the hon. Gentleman think that Lord Cameron closed them down, and why does he think that this Government reopened them?

[Alex Ballinger]

We do not know why Lord Cameron closed them down, because the Conservatives have not released any details of the deal that they negotiated up to that point. Maybe the costs were too high because they had not negotiated a better deal, or maybe things like the 24-mile security zone were not included in the deal, but this Government have secured a better deal. It is important for us to secure our national security.

It is also worth pointing out that Conservative Governments have not looked after our national security over the last 14 years. I have served, and I have seen the damage that was caused by 14 years of under-investment and neglect of our armed forces. Our Army has been reduced to a size that has not been seen since the time of Napoleon. Service accommodation standards are scandalous, which our people do not deserve in the slightest, and the Conservatives cut the defence budget so deep that Russia felt that we were too weak to stop an invasion in Europe. I am pleased to see that this Labour Government are investing again in our armed forces and starting to fix the damage of those 14 years.

Since we are talking about investment, let me touch on the investment value of this deal. Diego Garcia’s location—far from major population centres—makes it the ultimate secure base. It is a deepwater port in a key staging area in the Indian ocean, and is vital for our submarine operations. It contains the longest runway in the entire Indian ocean, putting our aircraft in reach of Africa, the middle east and east Asia. In order to continue the operation of such a base for 99 years, we are looking at an average cost of £101 million a year. That is around 0.2% of our defence budget—less than the cost of a single aircraft carrier. As we heard from my hon. Friends, it is a better deal than the French have achieved in Djibouti for a base that is right next to the Chinese operations, and has a total cost that is less than the amount of money that the last Government wasted on faulty PPE during the pandemic.

Diego Garcia is vital for our national security—I think everybody in this place agrees with that. Two years ago, the Conservatives also agreed on the need for a deal.

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[Rebecca Paul (Reigate) (Con)]

It is a privilege to speak in this debate, particularly following some of the incredibly insightful speeches, certainly on the Opposition side of the House.

Today is a hugely consequential day. The House is not being asked to debate in abstract, and neither are we considering ordinary legislation that can be repealed should its effect turn out to be unfavourable. We are being asked to endorse the permanent and irrevocable surrender of British sovereign territory. There is no way back from this, and I cannot support such action. My opposition is shared by Members on this side of the House and, I suspect, by more Labour Members than may be prepared to say so publicly.

We have heard the point before, but it bears repeating: the British Indian Ocean Territory is of immense military, security and geopolitical importance, and this Bill will give it away forever. It does so at a time of heightened instability and threat around the world. It does not take an expert on defence or foreign affairs to know that this is a terrible decision. It is one that puts virtue signalling before the national interest, plays into the hands of our enemies and ultimately puts this country and our citizens at risk, which is unforgiveable of any Government.

If what we are presented with today is indeed to be the final settlement of the issue, it is a settlement that satisfies neither the strategic nor the political doubts that have been raised. My first concern is the implications of this handover for our defence and security. For decades, Diego Garcia has played a critical role in the collective security of the United Kingdom, the United States and our broader network of allies in the region. The base serves as a launchpad to defeat our enemies, to prevent threats to our nation and to protect our economic security. It directly contributes to Britain’s strength at home and abroad.

In practice, the facility, known as Naval Support Facility Diego Garcia, fulfils multiple essential military roles. It supports approximately 15 key military tasks, including logistics, communications and intelligence gathering. The base acts as a prepositioning hub, hosting vessels carrying armoured vehicles, munitions, fuel and even mobile field hospitals for rapid deployment to wherever they are needed. It is equipped with a deep-water port capable of docking nuclear submarines and naval vessels, as well as runways accommodating strategic bombers, aerial refuelling operations and pre-launch operations across the Indian ocean.

Diego Garcia remains indispensable, but we are now being asked to jeopardise it. In truth, Parliament has been shown nothing of real substance that addresses the concerns that have been raised by Conservative Members. This House is being asked to vote blindfolded on the future of one of our most strategically important overseas territories.

This matters because, despite what Ministers seem to have convinced themselves to be true, the Republic of Mauritius is far from being a passive actor in the geopolitics of the region. Mauritius has repeatedly aligned itself with states hostile to our own strategic interests. It voted against the UK in the UN General Assembly and the International Court of Justice over the future of the Chagos islands in the first place. It maintains close diplomatic and economic ties with China, and China’s use of slave labour and expansionist agenda against Taiwan are well documented. More to the point, Mauritius has signed up to the global security initiative proposed by Beijing, which has been described by many regional experts as China’s attempt to displace US-led security partnerships. These concerns have repeatedly been brushed aside by Ministers keen to remind us that Mauritius is in fact an ally of New Delhi, not Beijing.

[Sir John Hayes]

The critical point here is that national security and the national interest are inseparable. Both depend on the sovereignty of this nation and the primacy of this Parliament, so although international treaties and agreements matter, of course, they can never matter more than that primacy. We cannot subcontract the national interest to an overseas place that in years to come might want to defend that interest, or might not, in exactly the way that my hon. Friend is describing.

[Rebecca Paul]

As always, my right hon. Friend makes his point well, and I completely agree.

The reality is that Mauritius is not a reliable or neutral guarantor of our security interests, and it is staggeringly naive for Ministers to suggest otherwise. To put it plainly, if the transfer proceeds, there can be no guarantee that our interests will be protected. As has already been raised multiple times, what will happen in 99 years is of significant concern.

On top of all that, we are not just giving away one of the centrepieces of our global security posture, but paying extortionately for the privilege. Hard-working taxpayers—my constituents—will be left footing the bill for the next 99 years, paying £35 billion or perhaps £47 billion for the lease that the Government have agreed. In Britian, we have faced cruel cuts, harmful tax rises and economic gloom under this Government. By contrast, the Mauritian Government have now begun celebrating their shrinking national debt and announcing a series of planned tax cuts, all as a result of the billions that we will send them.

Countries have lost wars and gone on to be offered treaties with more generous terms than this one, yet those on the Government Front Bench come to this House and call the deal a triumph. The UK will be weaker and poorer as a result, and it is shameful that the Government have brought such a damaging, insulting and senseless document to this House. By moving forward with this, the Government are failing in their first duty to ensure the safety and security of our citizens and nation. This day will go down in the history books as the day that the United Kingdom was diminished by dangerous fools.

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[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—