Diego Garcia Military Base and British Indian Ocean Territory Bill

Lord Callanan Excerpts

2nd reading
Tuesday 4th November 2025 Lords Chamber

[Lord Callanan (Con)]

My Lords, I thank the Minister for introducing the Bill, and I will come to some of her points shortly. This is now the second opportunity that we have had to debate the UK-Mauritius agreement concerning the Chagos Archipelago, including Diego Garcia, but it is of course the first time that your Lordships’ House has been asked to approve the agreement in law.

When we debated the Motion to approve the treaty under the CRaG process, I lamented the fact that the other place was denied the opportunity to have a substantive debate on the treaty at that point. If the Government are so confident in their arguments, why did they deny the other House the opportunity to debate this properly? As I said then, the Government played fast and loose with the conventions on treaty approval, despite promises that had been given by their own Ministers when the CRaG process was first introduced. The Government were elected on the back of pledges to put public service and integrity first; refusing to adhere to the conventions in this case hardly lived up to those promises.

That said, as a responsible Official Opposition—and recognising the primacy of the other place, which approved the Bill at Third Reading—we will not seek to deny the Bill a Second Reading today. We already know that the other place did not have the opportunity to debate the treaty when it was laid before the House, and the Bill subsequently received minimal scrutiny. In fact, Committee and Third Reading were both taken on the same day, and a total of just 17 hours of debate were allocated to a Bill that fundamentally changes our strategic security role in the Indian Ocean and puts £35 billion-worth of taxpayers’ money in the hands of politicians thousands of miles away from the UK.

Not only was there no mention of the Bill in the Labour manifesto; there was a specific promise to protect our overseas territories. For the election, the Minister’s party’s manifesto said:

“Defending our security also means protecting the British Overseas Territories and Crown Dependencies … Labour will always defend their sovereignty and right to self-determination”.


It seems that tax is not the only manifesto commitment being binned today.

Crucially, the views of the Chagossian people have not been heard. We feel it is only right that the Government should be required to consult the Chagossian community on the implementation of this treaty, including on the establishment of the Chagossian trust fund, which the Minister discussed. The UK taxpayer will fund it, but the Mauritian Government will have sole responsibility to distribute it however they see fit.

That is why I tabled the amendment to the original committal Motion that would have required the Government to consult the Chagossian community over a period of 30 days. If the Minister is concerned that 30 days is not long enough, I note that we talked about making it longer, but we did not do so because we wanted the Government to have the opportunity to get their Bill through this Session. If I had set the Motion at three months, the Minister would have told us that there is no time to have a Committee debate before the end of this Session because the Opposition are trying to deny them the Bill. We deliberately selected a short period so that the Minister could not argue that we were trying to wreck the Bill—that was not our intention. It was a measured, reasonable approach which we felt would have made up completely for the Government’s failure to consult the Chagossians to date and would help us in our work to give the Bill the proper scrutiny it deserves, informed by the outcome of that consultation. It was not a wrecking amendment, and the Minister knows that in her heart of hearts. Without that additional consultation—

[Baroness Chapman of Darlington (Lab)]

If the noble Lord was so concerned to do this, first, why did he not consult earlier? Secondly, he can achieve his aims—which would not be wrecking but would be perfectly legitimate —by amendment to the Bill, delaying implementation, perhaps. Those things are standard. He could make his case, or perhaps even win his vote, and achieve his aims, should they be genuine and not a wrecking amendment.

[Lord Callanan (Con)]

This treaty is due to last 100 years. How is it a wrecking amendment to take 30 days to consult the people who will be affected by it? The Minister is talking nonsense, and she knows it.

Without that additional consultation of the Chagossian people, we fear that the Bill, which received so little scrutiny in the other place, will go on to become law without the affected Chagossians having their views heard, as they rightly should. I know that a number of them have turned up to the Public Gallery to hear this debate today.

I hope that the Government’s decision to withdraw the committal Motion at the last moment is an indication that they are listening to us and want to think about this more deeply. It is clear to us that we need that consultation, so I call upon the Minister to bring it forward as part of the committal Motion when the Government eventually bring it back to the House. As I said, the Government intend this treaty to last 100 years; surely, we can take one month to consult the people most affected by it.

To call the Bill a surrender Bill is an understatement. This is a strategic capitulation that will see us give away sovereign territory that has been British for two centuries. To add insult to injury, taxpayers are paying tens of billions to Mauritius for the privilege of doing so. We know the important, strategic role that the British Indian Ocean Territory has played internationally as a staging post for forward operations in both the Indian Ocean and the Middle East. Handing over sovereignty, even with a lease agreement in respect of Diego Garcia military base, puts, in our view, that strategic role in jeopardy.

In particular, the requirement in the agreement that Mauritius must be informed of armed attacks on third states directly emanating from the base on Diego Garcia is an astounding failure of diplomacy. Could the Government tell us how this would actually work in practice, in a rapidly changing armed conflict? Has the US, which actually runs this base, agreed to do that? How would it work in practice? How would we inform them in an emergency situation, with proper notice to enable us to take strategic action, as required?

My noble friend Lady Goldie will expand on some of the security implications of this agreement, but we are clear that it is a capitulation that weakens our influence on the international stage. It is a surrender orchestrated by international lawyers and implemented by a Prime Minister who is either unwilling or unable to stand up for the UK national interest.

The Bill does not just relate to the UK’s affairs in the Indian Ocean; the sheer cost of the treaty with Mauritius makes the Bill a domestic issue, too. By pressing ahead with this legislation, the Government are facilitating an agreement that will see the UK pay almost £35 billion to Mauritius. I notice that the Minister spent quite a bit of her time disagreeing with those figures, yet only one hour ago, when I asked her how much of the ODA budget is being dedicated to this agreement, she got a cheap laugh, and avoided the question once again, as she has now done four times. However, she knows, as I know, that some of that ODA budget is being used to fund this agreement. If she wishes to be so transparent and disagree with our figures, why does she not tell us how much of it is going to be spent from the ODA budget? She can stand up and do it now, if she wishes.

[Baroness Chapman of Darlington (Lab)]

All of our ODA spending is published. It is probably one of the most transparent bits of government funding. I will send the noble Lord the website address so he can have a look and satisfy himself on this point.

[Lord Callanan (Con)]

I am grateful for that; that is a concession, of sorts. I have only asked her the question four times during Questions so far. Now that she is willing to be more transparent, that is progress, at least.

Against that backdrop, hard-working Britons will be furious that Ministers have somehow found £35 billion to send 6,000 miles away when we face such financial challenges here at home. The fact is that the treaty facilitated by the Bill will fund tax cuts for Mauritius while taxes are being hiked here at home. We put this deal on hold when we were in Government, when it was in its infancy. We saw its flaws, and we paused it. Alas, Ministers no longer have the clarity of mind needed to deliver for the British people and are—

[Baroness Chapman of Darlington (Lab)]

I am sorry, but that is factually incorrect and I would like to give the noble Lord the opportunity to correct it. It was paused, but when the noble Lord, Lord Cameron, was appointed Foreign Secretary, he restarted those negotiations.

[Lord Callanan (Con)]

I am happy to tell the Minister that I have spoken to the noble Lord, Lord Cameron, about that. He agreed that it was paused, which I think she has just confirmed.

Alas, Ministers no longer have the clarity of mind needed to deliver for the British people and, as so often with this Government, they have allowed themselves to be taken in by their international lawyer friends and donors. This all begs the question: why? Why did Ministers feel the need to pursue this agreement that puts Britain’s interests last? Why have the Government seen fit to saddle taxpayers with an additional financial burden, at a time when we are all being softened up for massive tax rises from the Chancellor of the Exchequer?

Ministers have told us, as the noble Baroness did again today, that this agreement is a legal necessity, but, as we heard from my noble friend Lord Wolfson of Tredegar when we debated the Motion to approve the treaty—I commend his speech to noble Lords who have not had the chance to see it yet—there is a range of views among very senior lawyers on this matter. The Government cannot hide behind legal advice, unless they want to publish it for us all to see. This was a political decision for which Ministers must take the political responsibility.

The almost single-minded obsession with international law has blinded the Government to the real threat from a country that itself pays absolutely no heed whatever to that same international law. We know that China has said that it wants to deepen its strategic partnership with Mauritius. As recently as 15 May this year, China’s ambassador to Mauritius said that the People’s Republic of China wanted to strengthen ties with Mauritius, noting the country’s “strategic advantages”, and expressed a commitment to elevating the bilateral strategic partnership. The Chinese ambassador to Mauritius is on the record as offering, unsurprisingly, massive congratulations on the deal and stating that China fully supports Mauritius’s attempt to “safeguard national sovereignty”. It is a shame that China does not show that same regard to the national sovereignty of other nations.

That is who the Government have appeased with this agreement. When the Government took office, they claimed that they would protect our national security. Can the Minister please explain how ceding national sovereignty to a country that is known to be deepening its ties with a nation that we know to be a threat to the UK will help them achieve that manifesto commitment?

As the Official Opposition, we will seek to amend the Bill in your Lordships’ House to ensure that the Chagossian community is properly consulted and that the agreement facilitated by the Bill does not put the desires of international lawyers before the interests of the British people, who have paid the taxes which are now to be transferred with careless abandon to Mauritius.

Speaking of the rights of the Chagossians, I find myself on this occasion in the unusual position of agreeing with noble Lords to my left when I say that the Government have not handled this well. In the other place, the Liberal Democrat spokesman, Dr Al Pinkerton, said that,

“this Bill fails the Chagossian people”.—[Official Report, Commons, 20/10/25; col. 756.].”

On this, we agree. Ministers have failed to properly consult the Chagossians to the point that the community is now furious with this Government, as we have all seen from our email inboxes.

However, there was another way. In the other place, the shadow Foreign Secretary, Dame Priti Patel, tabled a presentation Bill which included specific requirements

“to consult and engage with British Chagossians in relation to any proposed changes to the sovereignty and constitutional arrangements of the British Indian Ocean Territory”.

That is what should happen. The Chagossian community should be heard and not ignored.

In conclusion, the questions at the core of all our debates will remain these. Is this treaty a good deal for Britain? Does the Bill put us in the service of the British people? I do not think that it does—

[Lord Purvis of Tweed (LD)]

My Lords—

[Lord Callanan (Con)]

We will set out our reasons in detail, if the Bill ever returns to your Lordships’ House. I give way to the noble Lord.

[Lord Purvis of Tweed (LD)]

I have listened carefully to all the noble Lord’s contributions. I fear that he has missed something out, and I want to help him. First, can he explain briefly whether international law advice which was given to the previous Administration over the status of British sovereignty, and which has not changed for this Administration, has changed? Secondly, why did James Cleverly, on 3 November 2022, make a Statement to Parliament that that Government had decided to begin negotiations on the exercise of sovereignty over the BIOT Chagos Archipelago? If everything that he said was a point of principle, why did the previous Government accept that negotiations had to start on ceding sovereignty?

[Lord Callanan (Con)]

I am always suspicious when the Liberal Democrats say that they want to be helpful. We have debated all these points at length.

[Noble Lords]

Oh!

[Lord Callanan (Con)]

Noble Lords should listen to the answer.

It is a matter of public record that discussions took place. I have spoken to both James Cleverly and to my noble friend Lord Cameron about this, and we are very clear that no agreement was possible along the terms that had been outlined. That is why the negotiations were paused and why we did not reach any agreement at the time. That is why we believe the process is flawed and why we will oppose the Bill.

--- Later in debate ---

[Baroness Chapman of Darlington (Lab)]

I agree, and I will say a little about engagement. It is an important point, and it deserves a proper response. If there is more that we can do, we would be very open to discussions about how it could be done in the right way that does not derail the process that we are trying to undertake about bringing the treaty into law.

Having said that, we recognise the importance of the islands to Chagossians, and have worked hard to reflect this in our wider policies. The noble Lord, Lord Purvis, has, as he said, a long-standing position on this which I understand and respect. His impressive command of the history of this subject was put to good use in his previous interventions. I completely agree with his point about the shameful treatment of the Chagossian population.

On engagement, in the past three years officials have met Chagossians and groups over 30 times to discuss the agreement and FCDO’s wider support to the community. The Minister for Overseas Territories, Stephen Doughty, has met with Chagossians four times since he has been in post since July last year and, on 2 September, the new Chagossian contact group met. It has wide representation from Chagossian communities in the UK, Mauritius, the Seychelles and elsewhere to give Chagossians a formal role that shapes decision-making in the UK Government’s support for their community. The group met for the first time on 2 September and will convene quarterly hereafter.

Claims that all Chagossians are opposed to the agreement fail to respect the differing views of this diverse and vibrant community. We have seen some of that reflected in our discussions this afternoon. Many voices support the outcome reached, and these include the Chagos Refugees Group, the Chagos Islanders Movement, the UK Natives Chagossian Council and the Seychelles Chagossian committee. However, I accept that there are many Chagossians who take a different view, which is their right.

On resettlement, points have been made that the treaty does not guarantee Chagossians the right of return to the archipelago and that it should have done. This has come up several times. In 2016, when in government, the Conservatives ruled out resettlement, acknowledging the acute challenges and costs of developing anything equivalent to modern public services on remote and low-lying islands. The KPMG report, which has been mentioned several times and was commissioned by that Government, concluded that resettling a civilian population permanently on BIOT would entail substantial and open-ended costs. This agreement gives Mauritius the opportunity to develop a programme of resettlement on its own terms without requiring the UK taxpayer to foot the bill.

There has been a range of views about Mauritius and its reliability. Some noble Lords have implied that Mauritius is somehow an unreliable partner that cannot be trusted. These claims are insulting to Mauritius, which is a member of the Commonwealth and a westward-facing country with shared democratic values. Mauritius ranks among the top African nations in governance, human development and innovation. It is a full democracy, a regional leader in human rights and a trusted partner in upholding the rules-based international order. It ranks second out of 54 African countries in the Mo Ibrahim index of African governance. It is also one of only two African countries not to have signed up to China’s belt and road initiative. As an act of good faith, Mauritius stopped its legal campaign against us while we negotiated.

Much has also been said about China. There has been a substantial amount of complete misinformation about China’s influence in the region and reported plans to develop a military base in the Chagos Archipelago. The Mauritian Attorney-General has stated publicly that these claims are a gross falsehood and calls them a political gimmick. I can confirm, unequivocally, that the treaty prevents any foreign security forces, civilian or military, from establishing themselves in the archipelago. Furthermore, if the UK believes, for whatever reason, that any activity taking place in the archipelago would jeopardise the security of the base, Mauritius is obliged under the treaty to co-operate with us to prevent that risk, and the UK can veto any construction or development across the archipelago which we consider to be a security threat to the base. As for claims that China supports the treaty because it grants it greater influence in the Indian Ocean, that is, frankly, nonsense.

This is why our closest allies and partners have welcomed the deal, especially the US and other Five Eyes partners. They are satisfied that the treaty protects the base against foreign influence and think that it is essential for our capabilities for generations to come.

Many of the points on the issue of the environment are really quite important, including on marine protected areas. The noble Lord, Lord Thurlow, made a thoughtful speech about this. There have been claims made, both during the debate today and in the other place, that the Mauritian Fisheries Minister wished to issue fishing licences in the area, which would risk, the argument goes, the protection of the unique marine environment of the archipelago. It must be noted that the point the Minister was making was more to do with sovereignty than with fisheries policy, but, as I said in my opening speech, the Mauritian Government confirmed only yesterday that they will establish a marine protected area that follows current bounds of the BIOT MPA and that they will not allow any commercial fishing in any section of the marine protected area.

Noble Lords have quite reasonably sought assurances on enforcement of the MPA, and I expect this is something we will get into detailed discussion about in Committee. For today, I point out that, if the UK at any point believes that Mauritius is in breach of its environmental obligations, we can seek to resolve that using the agreed dispute resolution mechanism in Article 14. In any case, the UK and Mauritius are working to finalise the arrangements on maritime security to ensure that there are patrolling capabilities and that these are maintained.

[Lord Callanan (Con)]

On the point about the marine protected area, I think the Minister said that Mauritius had duplicated the zone absolutely. Is it not the case that it is not a no-catch zone? Point B in the communiqué issued confirmed that fishing will still be permitted in over 600,000 square kilometres of the zone.