Diego Garcia Military Base and British Indian Ocean Territory Bill Debate

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Department: Ministry of Defence

Diego Garcia Military Base and British Indian Ocean Territory Bill

Alex Ballinger Excerpts
2nd reading
Tuesday 9th September 2025

(4 months, 3 weeks ago)

Commons Chamber
Read Full debate Diego Garcia Military Base and British Indian Ocean Territory Bill 2024-26 Read Hansard Text Read Debate Ministerial Extracts
Luke Pollard Portrait Luke Pollard
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In a moment. I will come to the hon. Gentleman—he should not worry.

A judgment from such a tribunal would be legally binding on the UK. It would impact on our ability to protect the electromagnetic spectrum from interference, and impair our ability to ensure access to the base by air and sea, to patrol the maritime area around the base and to support the base’s critical national security functions.

Alex Ballinger Portrait Alex Ballinger (Halesowen) (Lab)
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My hon. Friend has spoken about the important capabilities of this vital US-UK base. Does he agree that it would be dangerous and counterproductive to put those capabilities at any risk—certainly if that could have happened in a matter of weeks or months?

Luke Pollard Portrait Luke Pollard
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I agree, and it is precisely the reason why the Conservative Government started the negotiations in the first place. You do not accidentally rock up one day to the Foreign Office and decide to start international negotiations; you do so because there is a clear risk to the future of the military base. That is why the Conservatives started the negotiations, why they had 11 rounds of negotiations, and why we had to conclude the deal.

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Luke Pollard Portrait Luke Pollard
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The Foreign Office and the Government published the Government’s legal position when the treaty was laid. That assessment says:

“The longstanding legal view of the United Kingdom is that the UK would not have a realistic prospect of successfully defending its legal position on sovereignty”

in any future sovereignty litigation. That important and long-standing view predates this Government. Again, it was one of the reasons why the Conservative Government began the negotiations and held 11 rounds.

Alex Ballinger Portrait Alex Ballinger
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Does the Minister not think it is the height of hypocrisy for those in the last Government, who negotiated 85% of this treaty over 11 rounds, to wait until they were in opposition to make these claims, none of which they made during their negotiations?

Luke Pollard Portrait Luke Pollard
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I thank my hon. Friend for that. It must be quite a freeing experience, because we now know that nearly every single legacy Tory MP during the last Government—whose Ministers started the negotiations, negotiated a deal, and made statements and answered questions in this House—were not actually supporting their Front Benchers, which is what we saw, but were deeply upset with the Conservative Government. If that is their genuine position, not just their political position now, they should have raised those concerns with the Foreign Secretary at the time. They should have been clear about it, but I believe that not many of them did so, and that tells a story.

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Alex Ballinger Portrait Alex Ballinger
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Does the Minister agree that it is completely wrong for the hon. Member for Clacton (Nigel Farage) and Reform UK to claim that President Trump did not support this deal, when he said it was a “very strong” deal that was secured for a “very long” time?

Luke Pollard Portrait Luke Pollard
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In support of the deal, the US Defence Secretary, Pete Hegseth, put it well when he said:

“Diego Garcia is a vital military base for the US. The UK’s (very important) deal with Mauritius secures the operational capabilities of the base and key US national security interests in the region. We are confident the base is protected for many years ahead.”

President Trump has described the deal as “very long term” and “very strong”.

That follows a rigorous US inter-agency process, involving the whole of the US security apparatus, both under the previous Biden Administration and the current Trump Administration. This involved the Department of Defence, the National Security Council and the intelligence agencies, including the CIA. Do Conservative Members say that they do not trust the assessment of the CIA, the US and all the security apparatus? The deal secures the use of the base—they are happy with it and we are happy with it. Our Five Eyes partners recognise the benefits of the treaty for our collective security. The deal is supported by Japan, South Korea and India. It is also a deal publicly welcomed by the African Union, the UN Secretary General and the Commonwealth.

I turn now to the issue of Chagossians, which needs to be raised as well. While the negotiations were necessarily conducted on a state-to-state basis, we are alive to the diverse views of Chagossians about their future, and we have the utmost respect for their past suffering.

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Priti Patel Portrait Priti Patel
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Absolutely right. Of course, this Government do not like speaking about inflation for all the macro-economic reasons we know about. Inflation under this Government continues to rise, which speaks volumes about their handling of the economy.

This deal is so bad for Britain, it has left our country humiliated and weaker on the world stage. Our friends and enemies alike are laughing at the UK and Labour’s epic diplomatic failure to stand up for our national interests.

Alex Ballinger Portrait Alex Ballinger
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The right hon. Lady says that this is an international problem for the UK, but does she not agree that the Americans, the Canadians, the New Zealanders, the Australians, the Indians and even the Pope support the deal? It is really important that our Five Eyes security partners are behind us.

Priti Patel Portrait Priti Patel
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Having led Five Eyes for our country—I am very proud to have done so—it is a matter of great concern that the deal has been backed by Iran, China and Russia. I say to the hon. Gentleman that that is exactly why this is a bad deal for our country. [Interruption.] It is correct, actually, and I can point him to the references where those countries have spoken in favour of the deal.

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Priti Patel Portrait Priti Patel
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I will give way once again to the hon. Member for Halesowen (Alex Ballinger).

Alex Ballinger Portrait Alex Ballinger
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Could the right hon. Lady outline what was in the deal that the last Conservative Foreign Secretary was negotiating? The points of sovereignty and everything else were conceded by her party.

Priti Patel Portrait Priti Patel
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I will now give way to the hon. Member for Kilmarnock and Loudoun (Lillian Jones).

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Priti Patel Portrait Priti Patel
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The hon. Member, who was laughing and sneering at fellow colleagues earlier—that is simply not acceptable—should have listened to what I said. I will restate it for the House: there was no deal done whatsoever.

Alex Ballinger Portrait Alex Ballinger
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Will the right hon. Member give way?

Priti Patel Portrait Priti Patel
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I will not. As we have already heard from Conservative Members, we have rarely seen the methodology that the Government are now hiding behind used for any spending announcements. When the Minister winds up, I wonder if he will commit to presenting all future spending decisions using this methodology—or perhaps he could explain why the Government have singled out this large and embarrassing expenditure to be formulated in this way. That is down to the fact that they are covering up a colossal cost.

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Priti Patel Portrait Priti Patel
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I am going to make progress, and I have taken plenty of interventions.

The Minister touched on the base at Diego Garcia, which is one of the most important military assets in the world. It gives us and our US allies significant global reach, but the treaty undermines that position, and the Bill contains no measures to mitigate its effects.

Alex Ballinger Portrait Alex Ballinger
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Will the right hon. Member give way?

Priti Patel Portrait Priti Patel
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I will not; I have given way plenty of times to the hon. Gentleman.

The surrender of sovereignty means that Britian will be a rule taker, taking the laws, rules and commands of Mauritius, and that restricts and impedes base operations. For example, Mauritius has signed up to the Pelindaba treaty, banning the stationing and storage of nuclear weapons; no Minister has been able to provide a definitive answer when questioned about how that may impact our security and defence, once the UK is no longer sovereign in, or able to exercise sovereign rights over, the Chagos islands and Diego Garcia.

Under the terms of the treaty, we are bound to notify Mauritius of various activities relating to our use of the base, including operations from the base against that country, and movements of our allies’ vessels. Despite heavy questioning, at no point have Ministers explained in detail how the notifications will work, and who will have access to the information.

Priti Patel Portrait Priti Patel
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The hon. and learned Member is absolutely right. That is why it was important to have a debate on the Floor of the House when the treaty came together, but we did not have one. The treaty brings into question everything about security, including our ability to be as strong and secure as we need to be.

It will come as no surprise to Members to hear that now that our sovereignty over the base is being surrendered, our enemies are queuing up to—guess what?—make friends with Mauritius. Just days before the surrender treaty was signed, Russia agreed a new partnership agreement with Mauritius that includes marine research. That so-called “marine research” conducted by Russia could take place just a handful of miles away from our base. Mauritius has also been courted extensively by Iran and China for further partnerships in a range of other areas. Despite the warnings, this inept Labour Government have failed to act to safeguard our interests.

Alex Ballinger Portrait Alex Ballinger
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Will the right hon. Member give way?

Priti Patel Portrait Priti Patel
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No, I have given way to the hon. Gentleman many times.

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Paul Holmes Portrait Paul Holmes
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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.

Alex Ballinger Portrait Alex Ballinger
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The hon. Gentleman will know that the Foreign Affairs Committee had the Minister in front of us to discuss the deal, so there has been parliamentary scrutiny on this, including by other Committees, just not by the Defence Committee. On the costs, as the PPS to Lord Cameron, maybe he can say a little bit about what the cost was of the deal they negotiated at the end of those 11 rounds—whether it was higher or lower than the deal we have reached now.

Paul Holmes Portrait Paul Holmes
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I can tell the hon. Gentleman. Let me say it very clearly and very slowly, because I know that hon. Members have written their speeches before the debate started: zero. Zero is less than the deal the Minister is choosing. Let me repeat it very slowly for the hon. Gentleman and for Members across the House: the deal was ended. There was no deal. The negotiations stopped. There were no negotiations.

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John Whittingdale Portrait Sir John Whittingdale
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I cannot answer the hon. Gentleman specifically on that issue, but I can tell him that it has been absolutely clear that whatever the UNCLOS opinion is, it is not binding on this country. We will read with interest its view, but it is not one that we are necessarily required to follow.

The existing position has safeguarded the interests of this country for a very long period, so the first question one is required to ask is: why are we changing a guaranteed security status for this country by handing over the sovereignty of Diego Garcia? As my right hon. and learned Friend the Member for Kenilworth and Southam has said, it is based on opinions that have been expressed but not ones that we are required to follow.

As the hon. Member for Crawley (Peter Lamb) said, I understand that the original linkage of the Chagos islands to Mauritius that took place was regarded as a matter of administrative convenience. However, they are actually 1,250 miles apart. On that basis, when the United Kingdom agreed to the independence of Mauritius, it was separated from the Chagos islands. There was no suggestion at that time that the two should be linked and that the islands be given over to Mauritius, which, despite the linkage, had no claim and no involvement in their running.

Alex Ballinger Portrait Alex Ballinger
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Does the right hon. Gentleman, who is my colleague on the Foreign Affairs Committee, acknowledge that by opening negotiations with Mauritius, the last Government conceded that there was a point around sovereignty to be discussed and that, certainly from then onwards, it was difficult for this Government to roll back that point?

John Whittingdale Portrait Sir John Whittingdale
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It had already been rolled back. The hon. Gentleman is right that the last Government began discussions because Mauritius expressed a view. However, that was on the basis that a mutually beneficial arrangement could be reached. It was concluded that such an agreement could not be reached, and on that basis the last Government ceased the negotiations. It is not a question of their being rolled back; it was this Government who chose to reopen negotiations that had been closed down by the previous Government.

I come back to the international judgments. The other one cited by Ministers on the Government Front Bench early on in the discussion, when this issue was first raised, was the risk to access to electromagnetic spectrum as a result of the ITU potentially reaching a judgment that might be based on the non-binding judgment expressed by the ICJ. There is no actual evidence that it was going to do that, but it was possible that it might, and for that reason the Government expressed the view that this was important.

I would point out that the ITU has no ability to determine the use of spectrum. The Minister, in answering a written parliamentary question in February this year, made it clear that the allocation of spectrum was a matter for sovereign states. The ITU is a sort of gentleman’s club where everyone gets together to discuss these matters, but it is not able to hand over the right to the use of spectrum from one country to another. It is also worth noting that the ITU has, over the years, been subject to considerable pressure from China, which had a secretary general of the ITU. I recall from my time dealing with issues around the ITU the real concern about how the Chinese were seeking to use the ITU, so in my view it is a good thing that the ITU does not have the power to allocate spectrum.

There are also serious strategic concerns that the Government have not yet properly addressed. As has already been mentioned, an element of the agreement involves a requirement for us to “expeditiously inform” Mauritius of any armed attack on a third state directly emanating from the base. When the Minister gave evidence to the Committee, I pressed him on whether that would require advance notification—

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Alex Ballinger Portrait Alex Ballinger (Halesowen) (Lab)
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I thank the Minister for his speech earlier, although he is no longer in this place. We have heard clearly from those on the Opposition Benches that they are opposed to this deal, so it is first worth outlining what sort of deal they are opposed to. They are opposed to a deal that secures our vital national interest on probably the most important base in the country’s history in the Indian ocean. They are opposed to a deal that is supported by every one of our Five Eyes closest security partners. As we have heard from many of them, they are opposed to a deal that they spent 11 rounds negotiating over two years, and we have not quite heard from them why they started negotiating that deal in the first place. They spent 11 rounds negotiating it, but they have not yet told us—the shadow Minister or otherwise—why they felt it was necessary and why they think this Government might have come to the same conclusion as they did at that time. I believe, as many of us do on the Government Benches, that that dangerous rhetoric puts the security of our base in Diego Garcia at risk. It is playing politics with our national security.

I want to take us back in history for one moment to look at a similar situation. During the second world war, the UK established another airfield in the Indian ocean known as RAF Gan. RAF Gan was the southernmost island in the Maldives, and it was secured in 1942 by the Royal Navy, and then taken over by the Air Force, to secure our operations all across the Indian ocean into the far east, combating the Japanese threat we were facing there. It was such a successful base that the Japanese did not even discover its existence until close to the end of the war, once their expansion plans had ended. Later, in the cold war, it became a vital staging post for the UK and our allies to get our forces across to Singapore and other bases in the far east. In fact, my father served there in 1974, and it was a great shame that two years later we closed that base and handed it over to the Maldivian Government at the same time that we secured our base in Diego Garcia.

I mention that case in particular because it was a vital strategic secure base of ours in a similar situation to Diego Garcia. As soon as the Maldivian Government took possession of that base, the Russians began to exert influence to try to take it over. They were attempting to take over the base that we occupied—that we spent decades developing—and turn it into a secure base for the Soviet Union. They are doing exactly the same thing again on Diego Garcia. They are trying to influence the Mauritian Government to claim the base for their own use.

Luke Evans Portrait Dr Evans
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Is this not the point that we have heard time and again from Government Members? This deal runs out in 99 years, and at that point Mauritius can simply close the base or hand it on to the biggest offer. We get first rights on it, but if the Chinese decide to invest hundreds of billions, we may not be able to match that. We are over a barrel. In 100 years’ time, people will be in this place having this exact debate saying, “How do we solve this problem?” Is the hon. Member as concerned about that as I am?

Alex Ballinger Portrait Alex Ballinger
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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.

John Hayes Portrait Sir John Hayes
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Will the hon. Gentleman give way?

Alex Ballinger Portrait Alex Ballinger
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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.

John Hayes Portrait Sir John Hayes
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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 Portrait Alex Ballinger
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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.

Lincoln Jopp Portrait Lincoln Jopp
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I am grateful to the hon. and gallant Member for giving way. On the pricing, he said that Government Front Benchers are putting it out that this is a good deal. Would it still be a good deal if it was £35 billion or something like that?

Alex Ballinger Portrait Alex Ballinger
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As the hon. Member will know, the official Government statistics say the cost is £3.5 billion, which is about 0.2% of our defence budget. I wonder what other assets in the entire world that may be worth 0.2% of our defence budget are quite as effective and important as Diego Garcia.

I will come to my conclusion. The last Government wanted a deal. They started negotiating a deal and conducted 11 rounds of negotiations on a deal. Now, however, because they think that they can score some political points, they are choosing to side with our adversaries. I humbly suggest that if they really had the UK’s national security in mind, they would agree with what the US State Department told the Foreign Affairs Committee on our recent visit to Washington, and some of the Conservative Committee members were in that meeting. The US State Department told us, “Thank you for securing this deal, which we think is vital for both our nations’ security.”

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Lewis Cocking Portrait Lewis Cocking (Broxbourne) (Con)
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There are no two ways about it: this is a surrender Bill with no benefits to my Broxbourne constituents. Ministers have shamefully attempted to hide the shocking cost of this deal from the British people and the public at large. When the new Labour Government took office, they kept telling us in this Chamber about the pretend £22 billion black hole in the public finances. If the black hole of £22 billion that we are continually told about by the Government did exist, I could solve it overnight—don’t do this deal. This deal is £35 billion to the Mauritian Government. The Labour Government go after British family farms with the family farm tax. They go after our pensioners and take their winter fuel allowance away, and they increase national insurance contributions for businesses, to make it more expensive for them to employ people, but they could just not do this deal. They talk in fiction, and this is an absolute disgrace.

How will Mauritius spend this money? By cutting taxes for its own citizens and paying their debts. Is the Minister proud that the only income tax cuts that this Labour Government will deliver are 6,000 miles away at the expense of the British taxpayer? The last time I checked, this was the British Parliament and we are supposed to stand up for British interests, not the interests of foreign countries or foreign citizens. We should be cutting taxes here and turbocharging the economy, not giving stuff away that we already own. We already have a base, and now we are going to lease it back, as we have heard from a number of colleagues.

Alex Ballinger Portrait Alex Ballinger
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Will the hon. Gentleman give way?

Lewis Cocking Portrait Lewis Cocking
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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.

Diego Garcia Military Base and British Indian Ocean Territory Bill Debate

Full Debate: Read Full Debate
Department: Foreign, Commonwealth & Development Office

Diego Garcia Military Base and British Indian Ocean Territory Bill

Alex Ballinger Excerpts
Nusrat Ghani Portrait Madam Deputy Speaker (Ms Nusrat Ghani)
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Order. Back-Bench Members are on a five-minute speaking limit. That will drop further as the debate continues.

Alex Ballinger Portrait Alex Ballinger (Halesowen) (Lab)
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In answer to the intervention by the hon. Member for Spelthorne (Lincoln Jopp), there is more than one veteran on the Labour Benches. I wonder what the veterans from the Conservative party who went through 11 rounds of negotiations under the previous Government were saying; they clearly supported this decision at that point, and there were clear reasons for doing so.

This is not an exercise in process; it is about whether this House chooses to protect on firm, enforceable terms an overseas base that is fundamental to British security and our closest alliances. Diego Garcia is a critical asset for the UK and our allies. It supports counter-terrorism, monitors hostile state activity, and enables the rapid deployment of UK and US forces across regions that matter deeply to our national interest. Those opposing the Bill need to be clear about what they are opposing. They are opposing a treaty that secures the base for 99 years with full operational freedom, one that is backed by our allies and was negotiated substantially under the previous Government.

Luke Evans Portrait Dr Luke Evans (Hinckley and Bosworth) (Con)
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Will the hon. Gentleman be supporting Lords amendment 1, given that he has just specified that the base needs to be used for military purposes? If that use becomes impossible, because the islands go under water, for example—which is a real risk—would he want to carry on paying for the deal?

Alex Ballinger Portrait Alex Ballinger
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I will not be supporting Lords amendment 1, because it would require renegotiation. We already have a joint commission to deal with issues that arise, and international treaty law would provide routes to termination if we were in that sort of situation, so the amendment is not necessary at all. I will come back to this question later in my speech.

If we refused to comply, others—international organisations and partners—would not ignore any provisional measures that were put in place, undermining the practical operation of the base. That is the same reason that negotiations were started under the last Government, and the treaty contains safeguards that are not decorative, but operationally vital. The UK will control installations and the electromagnetic spectrum; we will control a buffer zone of 24 nautical miles, within which nothing can be built without UK consent; and there will be a strict ban on any foreign military or security presence on the outer islands. Those are precisely the kinds of protections that make the base secure, usable and resilient against interference.

As we are in the Chamber today to consider the Lords amendments, I will go through each in turn. Lords amendment 1 would require renegotiation so that the UK can stop payments if it cannot use the base. On the surface, as others have mentioned, this may sound prudent, but it is a recipe for uncertainty and delay at the very moment that we need clarity. The treaty already establishes a joint commission to deal with issues as they arise, and international treaty law provides routes to termination if an indispensable object for execution permanently disappears. The amendment adds risk, not security, undermining confidence in the treaty framework that we need to keep the base operational.

Lords amendments 2 and 3 were rejected by Mr Speaker. Lords amendment 4 deals with the procedure for orders under clause 6 of the Bill. It is a Government amendment; responding to the Delegated Powers and Regulatory Reform Committee, it provides appropriate parliamentary procedure. It strengthens scrutiny and is a sensible refinement to how the Bill operates, and this House should support it.

Lords amendment 5, which deals with the publication of the total costs and methodology, is duplicative. The Government published full details of the financial arrangements on the day that the treaty was signed, including the relevant explanatory material. The methodology is clear: it uses the Office for Budget Responsibility’s inflation forecasts to calculate the average annual figures, and those figures have been verified by the Government Actuary’s Department. The House of Commons Library reached the same conclusion, and the Office for Statistics Regulation has welcomed this approach. The amendment is not about transparency; it is about rerunning an argument we have had time and again in this House, including through I do not know how many urgent questions.

Lords amendment 6 deals with Commons votes to cease payments if Mauritius breaches the treaty. This would require additional parliamentary steps on anticipated expenditure.

Graham Stuart Portrait Graham Stuart
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The hon. Gentleman is talking about the costs of the deal. Can he just set them out for the House? I do not think anyone has done so in today’s debate so far, and he is speaking with such expertise. It would be great to hear from him exactly what this deal is costing.

Alex Ballinger Portrait Alex Ballinger
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I will happily outline that to the House. The Minister has already outlined it: it is approximately 0.25% of the defence budget, which is tiny in comparison to the base in Djibouti that the French operate. If we compare it with the operation of an aircraft carrier or something of that size, it is very good value for money.

Lords amendment 6 would cut across long-standing constitutional practice on treaty payments, and would infringe Commons financial privilege and established arrangements for authorising expenditure. More importantly, it would send a damaging signal that the UK is building an exit ramp into primary legislation, weakening our hand and injecting instability into the very agreement designed to secure the base. The treaty already contains robust dispute resolution mechanisms, which is the right way to deal with such issues.

Graham Stuart Portrait Graham Stuart
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Will the hon. Gentleman allow me to intervene one more time?

Nusrat Ghani Portrait Madam Deputy Speaker (Ms Nusrat Ghani)
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Order. Would the hon. Gentleman like to continue?

Alex Ballinger Portrait Alex Ballinger
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Yes, I will continue.

The strategic logic is straightforward. Diego Garcia’s location, infrastructure and operational utility are indispensable.

Phil Brickell Portrait Phil Brickell (Bolton West) (Lab)
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On the security of the base, does my hon. Friend recall the visit to Washington DC that I think we both went on last year as members of the Foreign Affairs Committee? We spoke to many American interlocutors, including State Department officials. Over the course of an entire week in the US capital, not a single US interlocutor disagreed with or opposed the deal before us.

Alex Ballinger Portrait Alex Ballinger
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My hon. Friend makes a good point. This treaty has been through the interagency process in America and has support across the system. Colleagues may have mentioned the President changing his position, but the US system is much wider than that, and I do not think we should we should base our long-term strategic and security interests on Truth Social posts.

This House should reject Lords amendments 1, 5 and 6, support the Government’s sensible procedural amendment 4, and pass this Bill in a way that protects national security, rather than gambling with it.

Simon Hoare Portrait Simon Hoare
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On a point of order, Madam Deputy Speaker—never has a point of order been greeted with such joy from the Chair—you have rightly pointed out, as has Mr Speaker, the Lords amendments that engage Commons financial privilege. We guard that privilege jealously and exercise it with caution. How is the House supposed to exercise that financial privilege in an informed way when, despite several probes to the Minister to come up with a figure for what this deal will cost the public purse, those right hon. and hon Members attending the debate this afternoon have not been given that figure? We have had a lot of theory about how a figure had been arrived at, but no figure. How do we exercise—

--- Later in debate ---
Sammy Wilson Portrait Sammy Wilson (East Antrim) (DUP)
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This is a sad day for the United Kingdom. The Government have not been prepared to stand up for the interests of the United Kingdom. Indeed, they seem to be willing to surrender when any challenge is made to its interests.

Let us look at some of the arguments that the Minister has made against the amendments. First, the Minister said that nothing has changed since the Bill was originally brought to the House, but of course we have seen that the American attitude has changed. The United Nations says that we are not giving the protections to the people we should be giving them to—in fact, we are more interested in the rights of the Danes who live in Greenland than the Chagossian population. The UN has actually said that we should stay this. So there have been changes, and the changes have been substantial.

The second argument we heard is that the base was under threat and we therefore had to make changes. I noticed what the hon. Member for South East Cornwall (Anna Gelderd) said about the marine protected area and the environmental requirements on the Mauritian Government, but there is no legal requirement in this treaty for the Mauritian Government to protect the marine protected area. Indeed, they have made it quite clear that fishing will be allowed in the marine protected area. What is the danger there? It is of course that Chinese ships can come into the area, and we know that in the South China sea, the Chinese have used commercial ships as their eyes and ears, so the base is under threat as a result of this change.

Alex Ballinger Portrait Alex Ballinger
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Does the right hon. Gentleman recognise the 24-nautical mile exclusion zone that the Government negotiated in the treaty? It will prevent many of the things that he referred to.

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Aphra Brandreth Portrait Aphra Brandreth (Chester South and Eddisbury) (Con)
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The Bill goes to the very heart of our national security, the safety of the British people, our global reach and our operational effectiveness in two of the most volatile and unpredictable regions of the world: the Indo-Pacific and the middle east. It also raises serious questions about the cost of this deal to the British taxpayer, which amounts to £34.7 billion.

Even in the short time since the Bill was first brought to the House, the world has become even more unstable, yet the Government remain content to press ahead with the Bill. I struggle to see how it makes us safer, considering the requirement “to expeditiously inform” Mauritius of operational activity, and considering that Mauritius is a signatory to the Pelindaba treaty. The implications of the Bill for the basing of nuclear weapons, which are vital to our security and to our deterrence, and which have been deployed to Diego Garcia in the past, should concern every Member of the House. We need further clarity and assurance from the Government on that point.

That brings me to the £28 billion shortfall in the defence budget that the Chief of the Defence Staff recently presented to the Prime Minister. It does not take a mathematician to see the point that I am making; indeed, the maths is so basic that I suggest that even the Chancellor could work it out.

--- Later in debate ---
Jim Allister Portrait Jim Allister (North Antrim) (TUV)
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If it were possible, one could almost feel sorry for the Minister. This is the Minister who, during previous stages of the Bill, batted away every criticism by telling us, “Oh, but the Americans support this deal.” He gleefully told us that they were our strongest and most important ally, and if they were enthusiastic and supportive of the Bill, what was the problem? Today, the emperor has no clothes.

The President of the United States has talked about the great stupidity of this deal. He describes a country giving away its own sovereignty as

“an act of GREAT STUPIDITY”.

Today the Minister has been forced into some indelicate gymnastics, as he tries to deal with the fact that the peg on which he hung all his defences has snapped out of place.

The Minister’s gymnastics have been equally on display when it comes to dealing with his party’s manifesto. Contrary to what he says, it is very clear that when the manifesto declares that Labour will always

“defend… sovereignty and right to self-determination”,

it is referring not only to Gibraltar and the Falklands, but to all British overseas territories and Crown dependencies. It says

“including the Falklands and Gibraltar”,

but not “exclusively the Falklands and Gibraltar”.

Alex Ballinger Portrait Alex Ballinger
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Will the hon. Gentleman give way?

Jim Allister Portrait Jim Allister
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I do not think that there is time for the hon. Member to remedy his speech at this stage.

The Minister is hoisted on the petard of his own manifesto, of which he is in blatant breach. He can hardly look the people of the Chagos islands in the eye, as he denies them what his manifesto promised them. They are the people who are hurting here. They are at the heart of this. They have not been treated well over decades by this nation, and now we are betraying them by denying them the right to any determination of their future. That is shameful. It is something that this House should be running away from, rather than embracing. I say to the Government: it is not too late to do the right thing. It is time they did, and I trust that they will.