Diego Garcia Military Base and British Indian Ocean Territory Bill

Lord Callanan Excerpts

Tuesday 25th November 2025 Lords Chamber

[Lord Hannan of Kingsclere (Con)]

My Lords, I support the amendment of the noble Lord, Lord Morrow. I thank the Ministers for the patience and courtesy that they have displayed all evening. The two Ministers and the Whip know that they are among my favourite Peers, not just my favourite Government Front-Benchers, and they have been very patient and good-humoured.

I take issue with the idea that this is a done deal. That is an argument that has run through a lot of the debates and this seems to be the apt amendment on which to take it on. We have been told repeatedly—including by the noble Baroness, Lady Chapman, last week, and again just before dinner by the noble Lord, Lord Kerr of Kinlochard—that the treaty has been signed and been passed by the CRaG process and that therefore all this is, as it were, dancing after the music, and we would be exposing ourselves to a much more dangerous situation if we now try to hold it up.

I ask the Committee to ponder the possibility that the CRaG process has not in fact been a full democratic exercise. There has been no vote. Everything was rushed through from Second Reading in one day—there was no Report stage. I have never been a Member of the other place, unlike some of your Lordships present, but, as I understand it, you have a vote in the CRaG process by moving an amendment or a resolution and then voting for it. Looking online, I see that there is such an amendment, standing in the name of my right honourable friend the Leader of the Opposition and others, signed by 107 Members of the other place, from six political parties. I concede that that is not nearly as big a deal as it would have been a decade ago—there has been something of a splintering of parties. As yet, there has been no vote on it.

I mention this because the idea that therefore we have no option except to tweak statements at the margin and polish the edges of this, and cannot look for substantive changes, is fundamentally at odds with what was promised when the CRaG process was brought in. If the treaty was rushed through without debate in another place, surely the only proper scrutiny and the only proper chance of amendment is in this Chamber. Therefore, I hope that noble Lords on all sides will feel uninhibited when it comes to moving and, in due course, voting on substantive amendments. This is the one realistic opportunity that we have to make the points that would be made by the people from the Chagos Islands watching us now if they had a voice in our counsels.

[Lord Callanan (Con)]

My Lords, as the noble Lord, Lord Hannan, reminds us, this amendment gets to the core of the criticisms that have been levelled against the Government’s approach to this Bill so far. As my noble friend Lord Lilley pointed out numerous times during the debates on the first day in Committee, it is very difficult to see which court could have delivered a binding judgment against the UK on the question of sovereignty over the Chagos Archipelago. Yet it is the repeated contention of the Government that this treaty is somehow essential to deliver legal certainty.

The question remains of which court could have delivered a binding judgment that would have threatened that legal certainty and the security of the military base. I hope that the Government can finally provide us with an answer. If they cannot answer that question then the argument that this treaty and this Bill were both necessary falls apart. Indeed, the argument that the treaty and the Bill are needed urgently also falls apart, and we should consider whether the Government should take a more circumspect approach. That is what the amendment of the noble Lord, Lord Morrow, suggests.

If this treaty is necessary, Ministers must surely have considered other options before coming to this agreement with Mauritius. Perhaps the Minister can tell the Committee what consideration was given to resettlement of the Chagos Archipelago by Chagossians, for example. What would the cost have been for that? What is the difference between that cost figure and the true cost associated with this treaty? I say “true cost” because the Government’s initial claims on costs have now been thoroughly discredited.

There were lots of options that should have been considered, so perhaps the noble Baroness can tell us what options were in fact considered. I understand that these are specific questions about the process followed by Ministers before agreeing to the treaty with Mauritius, so if the noble Baroness cannot say with certainty what potential approaches were considered, perhaps she could write to us to confirm the details.

[The Minister of State, Foreign, Commonwealth and Development Office (Baroness Chapman of Darlington) (Lab)]

In relation to Amendment 20J, the House has dedicated at least 15 hours to debating the Government’s rationale for entering this treaty. It has been subject to two reports, by the International Agreements Committee and the International Relations and Defence Committee. Three separate committees—the IAC, the IRDC and the Foreign Affairs Committee—have held evidence sessions and questioned the Minister for the Overseas Territories.

The Government have been consistently clear throughout. The legal case was compelling and there was no credible alternative. A policy of hanging tough, which I assume the noble Lord has in mind, would have been a real gift to our adversaries. As we have stated on numerous occasions, the continued operation of the base was under threat. Courts were already making decisions which undermined our position. If a long-term deal had not been reached, further wide-ranging litigation was likely, with no realistic prospect of the UK successfully defending its legal position on sovereignty in such cases.

Legally binding provisional measures from the courts could have come within weeks, affecting, for example, our ability to patrol the waters around Diego Garcia. Both the IRDC and the IAC recognise that the treaty provides legal certainty for the base. I hope the noble Lord will withdraw his amendment.

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[Baroness Hoey (Non-Afl)]

My Lords, I will say a few words in support of the noble Lord’s amendment, which seems really sensible: we should not have been paying to give away British territory without a full and proper assessment of who was going to take it over. This all boils down to whether we trust Mauritius. My feeling is that, while I have probably a great deal of respect for Mauritian people, I am not sure that the Government of Mauritius is one that we would genuinely want to trust in the way that this whole treaty is doing.

I also detect a feeling among the Government and perhaps Whips that, really, we are all wasting our time here: “What on earth are we doing spending all this time?” As the noble Lord, Lord Hannan, said, we have seen how little time was spent on this and how quickly it came through once the election was over and the new Government were in place. Suddenly, this all was happening. That is why it is important that, even if there are very few people here, we consider all these issues. In the long term, this will all be recorded. There will be a time in the future when many people look back and say, “Oh, perhaps we should have considered that more when it came”.

I do not believe that Mauritius has treated Chagossians who live in Mauritius very well. Yes, there are a few who have done obviously very well and are now out cajoling and saying how wonderful it is that Mauritius is going to take over the islands, but the reality is that they have not been treated well. You need to just talk to any of the Chagossians who are here to discover what has been going on. That was when there was some kind of input from our Government; what on earth is going to happen when the British Government no longer have any say in what is happening in Mauritius?

We need a proper, detailed assessment of the ability of the Government in Mauritius to not just look after the welfare of Chagossians who are there, and in the future, but to look after the whole archipelago and obey the terms of the treaty. The treaty may not be tough enough, but, at the very least, we want to make sure that, if there is one, they carry through their side of it. I just have a real feeling that, once this is all signed and sealed, so many people will forget about what has happened and the Mauritian Government will have an easy time doing anything they want, and mostly not doing things that they should be doing to preserve those wonderful islands and the people who should be allowed to go back there. So I support this amendment.

[Lord Callanan (Con)]

My Lords, I thank the noble Lord, Lord Morrow, and the noble Baroness, Lady Hoey, for their contributions on the noble Lord’s Amendment 20K, which, much like his Amendment 20J in the previous group, asks a specific question of the Government, which I think gets to the heart of the process that was apparently followed by Ministers in reaching agreement on the terms of the treaty.

Clearly, Ministers will have had to consider other issues beyond the claim, which we have debated at length, that the sovereignty of the archipelago was somehow threatened by a binding legal judgment. The long-term security and effective management of the archipelago will, if the Government get their way, be delivered by the Government of Mauritius. We surely cannot have decided to pass that responsibility over to the Mauritian Government without first assessing their ability to manage the islands that we are, well, not giving t them but paying them to take. Would the Minister consider publishing the details of the Government’s assessment of Mauritius’s ability to manage and protect the islands effectively?

In an earlier group, we debated Mauritius’s responsibility for illegal migrants arriving on the islands, but this is just one of the relevant administrative questions that should have been considered by Ministers before an agreement was reached with the Mauritian Government. For example, was the fact that Mauritius does not even have a navy considered a relevant fact when the UK Government formed a view of the Mauritian Government’s ability to manage the islands?

The Mauritian National Coast Guard consists of one offshore patrol vessel, two midshore patrol vessels and 10 fast interceptor boats. As has been said repeatedly, the Chagos Archipelago is approximately 1,250 miles away from Mauritius. Do the UK Government feel that Mauritius’s coastguard is adequately equipped to deal with the challenges it will face as a result of this treaty? Can the Minister confirm whether her department have had any discussions whatever with the Mauritians about increasing their coastguard’s resources in light of their responsibility for the archipelago? If they even had a boat that could reach the distance, that would be a step forward. Will this be monitored by the UK Government on an ongoing basis and raised appropriately through the joint commission, or will we just say that we have handed the islands over and it is now the Mauritians’ responsibility, when we know from all available evidence that they have no capacity whatever to do any of that management?

The Mauritian coastguard’s role is not only important for the Mauritian Government’s access to and administration of the islands. The coastguard will, presumably, play a role in establishing and maintaining the marine protected area that the Minister has told us at great length that they are establishing. What discussions have Ministers had with their Mauritian counterparts to fully understand their plans to protect this important marine protected area? It does not have any boats that can even reach the islands, never mind protect the islands from any access by foreign vessels. Can the Minister confirm whether the UK Government are satisfied that the Mauritian Government have or are about to acquire the capabilities needed to maintain the protected area? When this was debated on the previous day of Committee, the Minister said:

“The MPA will be for the Mauritian Government to implement”.—[Official Report, 18/11/25; col. 801.]


I am sure it will, but have we not given any thought whatever to their ability to implement that?

We understand that this would be the responsibility of the Mauritian Government if the Bill goes through, but does the Minister think that there is any responsibility whatever for the UK Government to ensure that those nations with whom we make agreements are able to practically fulfil their obligations before we then sign a treaty? It is essential that we should have some clarity on this process that Ministers have followed in establishing that Mauritius has not just committed to the terms of the treaty but is in a position to be able to honour the terms of the treaty if and when it finally comes into force. I look forward to the Minister’s response.

[Baroness Chapman of Darlington (Lab)]

My Lords, Amendment 20K, tabled by the noble Lord, Lord Morrow, seeks to oblige the Government to publish a report on the ability of Mauritius to govern the Chagos Archipelago and on the implications of the treaty for international peace and stability. The IRDC concluded that the treaty gave the UK legal clarity on which it could capitalise to enhance defence co-operation and that it was a platform for reinforcing operational links with key regional partners, allowing the UK to position itself as a credible contributor to regional stability grounded in the rule of law. Under the treaty, the UK retains full operational control over Diego Garcia. There are robust provisions in place to protect the security of the base. The treaty is the best way to ensure the continued operation of the joint UK-US base and therefore to protect international peace and security. I hope that the noble Lord will withdraw his amendment.

[Lord Callanan (Con)]

The Minister has not even attempted to address any of the questions that we have asked.

[Baroness Chapman of Darlington (Lab)]

I am very happy if the noble Lord would like to ask me a specific question that I have not already answered in previous groups. Would the noble Lord like to do that?

[Lord Callanan (Con)]

Will the Minister comment on the ability of the Mauritian coastguard actually to enforce the marine protected area, for instance?

[Baroness Chapman of Darlington (Lab)]

I suggest that the noble Lord looks at the ways in which marine protected areas are generally enforced. It is not, as he seems to imagine, by patrolling in vessels around the ocean, checking on things. That is not how these things work. But I will gladly send him some information about that.

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[Lord Lilley (Con)]

My Lords, I am grateful for the opportunity also to speak to my Amendments 20U and 20Q. Amendment 20U would provide that the Bill shall not come into force until the Secretary of State has published

“a report on how the Treaty may increase any political or legal risks”—

that is what we have been told underlie it—

“related to … reliance on third countries required to service the base … risks of litigation from Mauritius regarding the base in Diego Garcia in the International Court of Justice”—

and I hope this will include some explanation of the Government’s reactions to the Mauritian declarations of 23 September 1968 which, as I understand it, mirrored our determination that the ICJ should not have jurisdiction on disputes between previous and current Commonwealth states and ourselves; Mauritius likewise said that any such disputes should be settled reciprocally. Finally, the report should include the

“risks of litigation in an arbitral tribunal under Annex VII of UN Convention on the Law of the Sea”.

The Minister said a little while ago that we spent many hours discussing the reasons or rationale behind the decision to cede sovereignty. In fact, we have spent many hours dragging out from the Government an explanation of their decision to do so. It is pretty clear that the decision came first, and their justification has been cobbled together in response to each successive challenge that has been put forward to it. The more it has been challenged, the more tenuous the rationale has become. It has been spread out like an elastic band and has become thinner and more transparent. It is very clear that, if we keep on this process, it will eventually break and then the Government will be without any rationale at all.

The Government first suggested that the ICJ decision was purely advisory but Mauritius might come back and somehow get a definitive ruling out of the ICJ. However, that was then abandoned because, of course, we had the specific opt-out when we signed up to the ICJ that it would not be able to consider disputes between ourselves and present or previous Commonwealth countries. One thing has puzzled me. Looking back through the record, I have never seen Ministers refer in words to that opt-out. They have tacitly acknowledged it, because they move on to talking about the United Nations Convention on the Law of the Sea. Likewise, when we have heard from the great mandarins of the Foreign Office, none of them has ever explicitly let past their lips—if I have read the transcript correctly—the existence of this opt-out. That is a great mystery. When people do not say something, one wants to know why, particularly when they tacitly admit it.

Oh dear, I hope I have not caused the noble Lord, Lord Kerr, to leave in disgust. We were hoping he would be able to break this omertà that has forbidden him and his colleagues ever to mention this.

My suspicion—of course it is no more than a suspicion, and the person who could have set that right has left the Chamber—is that the Permanent Secretaries in the Foreign Office and the other mandarins who have spoken in defence of the Government on this never actually told Ministers about this opt-out and they do not like to admit that. Ministers do not like to admit that they did not know about it, because that looks pretty difficult. Maybe in the course of debate we will find that that is an unworthy consideration and they were told explicitly at the beginning there was no possibility of the ICJ reaching a binding judgment on the sovereignty of the Chagos. They tacitly accept that is the case and move on to the possibility of a judgment coming from the tribunal set up under the UN Convention on the Law of the Sea.

My amendment would force the Government to be more explicit about that. What precedents are there for this tribunal ruling on sovereignty? The noble Baroness said that she thought it was very unlikely—I think that was her phrase—that the tribunal would directly rule on sovereignty. I think she is more than right on that, because there are no precedents I can find for it ruling on sovereignty. But then she said that it might rule on other things and sort of assume sovereignty. I would like some examples of that sort of thing happening, if it is a sufficiently big risk for us to be doing this nefarious deed of ceding sovereignty over the Chagos Islands. We have not had that up to now.

The tenuous justification moves on to say that there may be a ruling that would somehow assume sovereignty, but what negative effects would that have? It would apparently put the base at risk, because of its reliance on being supplied from other countries. From which other countries is the Diego Garcia base supplied, and in what way, and how would that be put at risk? Is it supplied from Aden? Would the Suez Canal be closed to British shipping if it was thought to be supplying the base? Would we get labour from mainland Africa to help run the base? Would the Philippines refuse to send Filipino workers to help run the base? When we are given such a tenuous reason, at the end of a long chain of tenuous arguments, we need some substance to it. This amendment would require the Government to give that.

Amendment 20Q would provide that the Bill would come into force only

“when the Secretary of State has published a report into the governance of the Chagos Archipelago under the Treaty, including local administration and democracy”.

The Minister has said that there was never any settled population in the Chagos Islands, nor any system of local administration. I am sure that was said in good faith, and I can well understand that the detailed history of the Chagos Archipelago is not something most of us have studied, but a letter has now been sent to the Minister, and to the committee that has been asked to consult with the Chagossians, pointing out that, in the absence of the British, who sort of came and went, the inhabitants of the Chagos Islands elected a chief to help with the governance and local administration of the islands. Therefore, the settled inhabitants did have a local administration in the past, and we want to know what is going to replace it in future.

We know that Mauritius, while it has no obligation to, will be able to resettle the islands. It may, of course, settle them with Mauritians, not Chagossians. Either way, what system of administration will there be, and will it be democratic or autocratic? I think we should know. My Amendment 20Q would require the Government to spell that out, and to acknowledge and accept that it was a mistake to say that there has never been any system of local administration, when clearly there has.

[Lord Callanan (Con)]

My Lords, I thank my noble friend Lord Hannan of Kingsclere for leading this debate. He set out a very strong argument for his amendments in this group, as did my noble friend Lord Lilley and the noble Lord, Lord McCrea of Magherafelt and Cookstown.

Amendment 20L, in the name of my noble friend Lord Hannan, is a very helpful amendment in Committee, as it affords the Committee the opportunity to debate the impact of the Government’s decision on the Chagos Archipelago on other overseas territories. While I accept that there are, of course, legal arguments here, we believe that they should be explored fully. I want to focus on the impact of the UK Government’s treatment of the Chagossians, and on our reputation among other overseas territories, which look to the UK for steadfast support and security. How do residents, and descendants of the residents, of other overseas territories feel now that the Government have caved in to pressure from their international lawyer friends on the question of the Chagos Islands?

As my noble friend Lord Hannan observed, the British Indian Ocean Territory is not the only overseas territory subject to legal claims by foreign states. Does the Minister accept that the behaviour of our Government on this issue will have ramifications for the level of trust in the UK held by residents of other overseas territories? We should be standing up for our overseas territories and protecting those who live on them, not caving in to activist international lawyers. In my view, it really is that simple. Can the Minister confirm that the UK Government are not considering ceding sovereignty over any other British Overseas Territories? Will she rule out such a move in future? We want residents of the overseas territories to feel secure, and I hope that the Minister’s words in response to this group will help to give them that security.

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Finally, given the commitment of the British people to fair play and their predisposition to support the weaker party, what assessment have the Government made of the potential impact of such a development on British public opinion?

[Lord Callanan (Con)]

I thank the noble Lord, Lord Morrow, for his Amendment 81 that he has just talked about, which rightly puts the focus of our debate on the citizens of the Chagos Islands, the Chagossian community themselves. It has so far been a disappointing aspect of this Committee to hear the Government dismiss the rights of the Chagossian community. Throughout the process of agreeing the treaty, it is clear that the Chagossians have not been properly consulted. In fact, the Government’s official view—I think the noble Baroness has repeated it again this evening—is that there is no relevant claim of self-determination in respect of the Chagos Archipelago.

I also welcome Amendment 50B in the name of the noble Baroness, Lady Hoey. The resettlement of the Chagos Islands under the treaty is an option, not a requirement, and it is increasingly clear that it is possible that the Mauritians will simply ignore it and not take any steps whatever to achieve resettlement of the Chagossians.

The amendment from the noble Baroness, Lady Hoey, would certainly help put pressure on the UK Government and, in turn, the Mauritian Government to use the provisions of the treaty in respect of resettlement and allow those Chagossians who wish to to return to the outer islands.

On a separate but related note, I am of course pleased that the International Relations and Defence Committee has launched its relatively short piece of work to finally hear the views of the Chagossian community, but I think there are some serious procedural flaws in its survey. There seems to be no control of who can submit views: I am sure the relevant Chinese bots are already on the subject of submitting the survey forms, and there are already concerning reports of Mauritian government officials actually filling in the forms on behalf of Chagossians in Mauritius. But, when the results are in and we have the report of the committee, I hope the Minister will commit to considering it carefully before we proceed to the next stage of the Bill.

We obviously understand that there may be limited time between the committee’s publication of its report and Report stage, so the Government may not have the time to consider and table their own amendments to reflect the views of the Chagossian community as expressed in the—valid, hopefully—responses to the committee. Should that be the case, we would ask the Government to engage constructively with others in this House on amendments before Report so that we can put the needs and welfare of the Chagossian community front and centre as we progress with the Bill. I hope that the Minister will be able to give that assurance today.

As the amendment from the noble Lord, Lord Morrow, seeks to do, we need to step up and support the Chagossian community, who have been mistreated for far too long.

[Baroness Chapman of Darlington (Lab)]

My Lords, Amendment 20M, tabled by the noble Lord, Lord Hannan, requests that the treaty does not come into force until the publication of

“a report assessing the impact of Article 6 of the Treaty”.

As I and other Ministers have said on numerous occasions, it will be for Mauritius to establish a programme of resettlement once the treaty enters into force. It is not sensible, or a good use of taxpayers’ money, to be reporting on something that will not be in our gift to achieve.

The Government are increasing our support to Chagossians living in the UK through new and existing projects. These include Chagossian-led community projects in Crawley and elsewhere, education and English language support, and have involved the creation of a number of FCDO-funded full-time jobs for Chagossians.

Amendment 81, from the noble Lord, Lord Morrow, requests a report of the forecast impact of the treaty on Chagossians. The Government have already released the public sector equality duty report relating to the treaty, which addresses all the issues around an equalities impact assessment. This, in addition to the IRDC’s current review, should support understanding of the impacts to the Chagossian community.

I understand, respect and appreciate the noble Lord’s support for the Chagossian community, but I must also speak to the many different views within the Chagossian community, including several groups that welcome the deal. I think that this will perhaps be surfaced as a result of the work that the IRDC is doing, and I obviously commit to reflecting on it as the Bill proceeds.

Amendment 50B, tabled by the noble Baroness, Lady Hoey, seeks to recognise in the domestic law of the UK that the Chagossians are the indigenous people of the Chagos Archipelago. I hear absolutely what she says about lived memory and the persuasive way that she puts that across. But the unfortunate fact—and I think it is unfortunate—is that both the English courts and the European Court of Human Rights have considered in a series of judgments since the 1970s the related questions of a claimed right of abode or other rights said to flow from the rights that she seeks to gain for the Chagossians through her amendment. On each occasion, the English courts and the European Court of Human Rights have ultimately dismissed the claims.

Had that not been the case—the noble Baroness clearly wishes that that had not been the case; it is her strongly held view and I can see why she feels so—the Government would perhaps have had to take a very different course, because the rights would have held a different weight in law. However, the situation is that history has taken us to a position where, much as we do not like it and it goes against some of the things that we feel and what we may even argue is the moral case, the legal situation is, I am afraid, as it is.

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[Baroness Goldie (Con)]

My Lords, I did not expect to participate in this, but I was having a conversation earlier with my noble friend Lord Minto, who is very knowledgeable about corporate finance. He posed the question: is there anything in this whole arrangement that would stop Mauritius capitalising on the revenue stream that they have coming to them and selling that off to someone else?

[Lord Callanan (Con)]

I am sorry that my noble friend Lord Kempsell is not here to move his amendment, which I thought was a particularly good one.

We debated some of the financial aspects of the treaty on the first day in Committee. The Minister at that time asked to delay her remarks on those amendments to the appropriate group. I assume this is the group that she was referring to, so we all look forward to the fuller answer on the finances that she promised then.

The core contention of the Government is that the deal costs an average of £101 million a year and the present net value of payments under the treaty is therefore £3.4 billion. This has been challenged by my noble friends Lady Noakes and Lord Altrincham, but the Minister, rather than engaging in the substance of those challenges, has relied on the Government’s published figures and refused to explain why she believes those figures accurately reflect the cost of the deal.

The Minister has relied on the approval of the Government Actuary’s Department and simply argued that consistency was essential. These are typical deflections that, no doubt, many Ministers have used in previous cases, but they do not address the concerns of my noble friends. We know that the payments are front-loaded at £165 million for the first three years, and then £120 million for the next 10 years. After that point, it is index-linked. As my noble friend Lady Noakes set out at Second Reading, that will see the cash payments hitting more than £650 million a year by the end of the 99 years, depending, of course, on what indexation you use. With all those additional considerations, it is our contention that the true cost of the deal is not £3.4 billion, as claimed by Ministers, but something more like £35 billion.

So the question lands: why would the Government seek to play this down? If they are so delighted with the deal—if it is such a good deal for the British public that they keep claiming that they deliver for, as all government policies should surely be—then surely they would want to be open about the true cost of things. They brag about spending on every other area; they take every amount of money per year, cumulatively add it all up and then put it in a press release and brag to the British people about what a great amount they are spending in every area except for this one. Does the Minister think it is better that the country should know the full costings before the treaty comes into effect, or would she prefer that the UK tie itself into these vast annual payments first, before admitting what the true cost of the deal actually is?

We are clear that the British people deserve to know what their Government are signing up for. Ministers should engage with the detailed costings laid out by my noble friends Lady Noakes and Lord Altrincham, and the points made by my noble friend Lord Lilley, rather than hiding behind their pre-prepared lines. If they have nothing to hide, what is wrong with producing a report that we can all see and study and get checked by independent financial experts? Once Ministers have admitted the true cost of the deal, then they can start justifying the so-called benefits of the treaty against what the true cost actually is. I do not think that people would be impressed by arguments justifying that figure, but Ministers should do the decent thing and justify the real numbers openly and in public.

[Baroness Chapman of Darlington (Lab)]

Noble Lords will recall that we debated the financial elements of the treaty in some detail last week, and I genuinely do not think that further debate is going to persuade anybody of anything this evening and probably is not a good use of time at this stage. However, I respect that the noble Lords, Lord Lilley and Lord Kempsell, who was not here to speak to his amendment, have tabled further amendments, so I am happy to put their minds at rest about the matter to the best of my ability this evening.

Noble Lords already know that the Government published full details of the financial payment on the day that the treaty was signed. These details are in the finance exchange of letters, which is included in the treaty in the version laid in the House and published on the government website. The details are also set out in the accompanying Explanatory Memorandum, which was also laid before the House and published on the government website. It is plain to see how much the treaty is costing. The breakdown on page 10 of the Explanatory Memorandum is particularly straightforward for anyone who might desire further information about what will be paid in each year of the treaty. Indeed, the clarity with which the information was presented by the Government was welcomed by the Office for Statistics Regulation, which confirmed that it was consistent with the principles of intelligent transparency.

Therefore, there is no requirement for any additional report on the financial costs, either before the Bill comes into force, as the noble Lord, Lord Lilley, proposes, or before each payment, as is suggested in the other amendment.

The quid pro quo I was asked about is that we get a unique military asset shared with our closest ally on a legally secure basis. The noble Lord, Lord Callanan, asks why I rely on government figures and the answer is because I am representing the Government. With that, I hope that the noble Lord will feel able to withdraw his amendment.

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[The Earl of Leicester (Con)]

I want to add to my noble friend’s words. I will not read the whole letter, but this is a copy of the letter to the Minister from the Chagossian people. They write that the Minister’s words

“cut deeply. They erase our history, our dignity, and the truth of who we are. They echo the very language used to justify our people’s deportation between 1968 and 1973. And they are demonstrably false … For more than a century before our exile, the Chagos Islands were home to a multigenerational, settled population. This is not our opinion. It is documented in church registers of births, marriages, and burials across Peros Banhos, Salomon and Diego Garcia; colonial-era records describing communities with homes, chapels, gardens and workplaces; judgments of the UK High Court in the Bancoult cases; the International Court of Justice; United Nations resolutions; academic research stretching across decades. We were not transient workers. We were a Creole-speaking people, rooted in our islands, with our own traditions, our own culture, and our own community life. To say that our homeland had ‘no permanent population’ is simply untrue … You also stated the islands had ‘never been self-governing’. Chagossians have never claimed to have operated a Westminster-style system. But for generations, in the long absence of resident British administrators, our islands were organised and cared for by local leaders from within our own community”.

This has been confirmed in academic work. Misley Mandarin, who lives here in London now with his family, finishes,

“We ask you not for sympathy, but for recognition. Not for pity, but for accuracy. Not for charity, but for truth. We deserve self-determination. We want to stay British and return to our islands as British citizens”.

[Lord Callanan (Con)]

My Lords, Amendments 20T and 81K, in the name of my noble friend Lord Lilley, seek to achieve a similar objective to Amendments 80 and 82. Given the similarity of the two pairs of amendments, I was slightly surprised to see the noble Lord, Lord Purvis of Tweed, degroup his amendments. We could have had a very satisfactory debate with the original grouping, but of course I fully respect the noble Lord’s right to degroup his amendments. I am slightly surprised, because he criticised me for doing something similar last week, but it is, of course, only right that noble Lords should be able to debate their amendments in the groupings that most suit them.

I am pleased that my noble friend Lord Lilley has the right to self-determination, as confirmed by a referendum of the Chagossians, in his amendment. This is an important point that I am sure many noble Lords will agree with.

Amendment 20T would also delay the implementation of the key parts of this Bill until some progress has been made on establishing the joint parliamentary commission. It seems to me that too many core parts of the treaty are not tied to deadlines or quantifiable outcomes. As a result, it would be hard to monitor whether Mauritius, and indeed the UK, are fulfilling their obligations under the treaty in a timely manner. My noble friend Lord Lilley’s amendment helpfully ties the joint parliamentary commission to the coming into effect of the Act, forcing Ministers and their Mauritian counterparts to get on with the job so that the commission can play an important role from the very beginning of the treaty’s effect. It is a very sensible proposal.

I look forward to hearing the Minister’s response on whether the Government will agree that establishing a joint parliamentary commission would be a useful tool going forward.

[Baroness Chapman of Darlington (Lab)]

My Lords, as the noble Lord opposite has indicated, it is slightly surprising that the four amendments on establishing a joint UK-Mauritius parliamentary commission or committee have been degrouped. Members are well within their rights to do this and I am glad at least that this time noble Lords have had sufficient notice of what is happening.

I am sensitive to the sentiment of these amendments. I take them to come from a genuine desire for greater parliamentary involvement in the scrutiny of the implementation of the treaty on specific areas that are of concern to the Committee. The Government have always said that they welcome scrutiny, and this remains the case. We are not opposed to the strengthening of links between the UK Parliament and that of Mauritius, although this would be a somewhat novel approach. I think it seems pretty likely that the noble Lord, Lord Lilley, took inspiration from the amendment tabled by the noble Lord, Lord Purvis, on this occasion.

There is a question of proportionality and the proper extent of the remit of such a parliamentary commission. Out of respect for the noble Lord, Lord Purvis, I propose to discuss this in much more detail when we reach the debate on Amendment 80, which he has tabled. I hope that is acceptable to the noble Lord. I will be very happy to meet with him and other noble Lords to discuss this proposal, and specifically the amendment from the noble Lord, Lord Purvis, in more detail. I hope that, with that, the noble Lord will withdraw his amendment.

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Debate on whether Clause 2 should stand part of the Bill.

[Lord Callanan (Con)]

My Lords, the amendments in this group relate to issues around the ceding of sovereignty over the Chagos Archipelago to Mauritius. I asked a question on the previous day of Committee about the drafting of this Bill and why it does not mention Mauritius. I wonder whether the Minister has had time to think about that and will be able to give your Lordships’ Committee an answer today. As I mentioned then, there are some previous examples of similar legislation that actually named the state that is gaining sovereignty, so I am keen to know why the precedent was not followed in this case.

My Amendment 33 simply seeks to remove two unnecessary subsections from the Bill. If we remove Clause 3(1) and (2), as my amendment would, we will be left with the simple statement that

“His Majesty has under his prerogative the like powers to make laws for Diego Garcia as His Majesty had before commencement for the British Indian Ocean Territory”.

With that simple statement, the Bill would assert His Majesty’s powers sufficiently and he could use those powers to ensure the continuity of law from the British Indian Ocean Territory to Diego Garcia. Given that these powers are under the prerogative, we cannot understand why a statutory provision is necessary to ensure the continuity of law following the ceding of sovereignty.

Furthermore, if the Bill passes in its current drafting and a future Parliament were to repeal this clause, what would the effect be on His Majesty’s prerogative powers? I understand that the Government’s intention is not to undermine the prerogative with the Bill—that is clear from Clause 5(4)—but why have they not included an identical provision in Clause 3? If the Government are merely confirming His Majesty’s prerogative powers, should the drafting not be simpler, so as not to risk limiting the prerogative?

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[Baroness Chapman of Darlington (Lab)]

In response to the desire of the noble Lord, Lord Callanan, that we are clearer in the Bill about what it does, I have read it a couple of times and honestly do not think that it could not be any clearer. It is a Bill to enact an agreement between the United Kingdom and the Republic of Mauritius concerning the Chagos Archipelago. I think that is sufficient, and if he does not, I am not sure what he is getting at.

The Government rejects Amendment 33 on the basis that the provision in question is not redundant. It is needed to ensure the secure and effective operation of the base. It ensures clarity on which law will apply through the jurisdiction that the UK will exercise under the treaty. Legal continuity and certainty for operations on the base once the British Indian Ocean Territory is dissolved is far from unnecessary.

Let me explain why we have Clause 3. This clause saves the law of BIOT, and law which relates to BIOT, as the law of Diego Garcia and law which relates to Diego Garcia. This has been done as the default, to ensure the continued effective running of the base on Diego Garcia and to make sure that there is no legal gap. Detailed work is being carried out to establish where technical amendments may be needed to this preserved law to reflect the new status of Diego Garcia. Diego Garcia is defined in Clause 3 as the whole area that the UK can exercise jurisdiction over, as covered in the treaty. This includes the island of Diego Garcia and the 12 nautical miles surrounding it. Preserving the existing prerogative power to legislate for Diego Garcia means that we can continue to operate the base and its legal architecture in much the same way that we do today, and it gives the maximum flexibility for the future.

Amendment 51, tabled by the noble Lord, Lord Callanan, seems to be based on a misapprehension. As I mentioned in my response to the amendments related to Clause 3, His Majesty has a prerogative power to legislate for BIOT at present and Clause 3 preserves this power. It does not allow him to make laws for other parts of the realm about BIOT or Diego Garcia. If the noble Lord reads that clause of the Bill again, he will see that I am right about that.

The statutory power in Clause 5 is necessary to enable amendments to Acts and statutory instruments which form part of the law of Diego Garcia and amendments to legislation which forms part of the law of other jurisdictions—the UK Crown dependencies and the other OTs. These other jurisdictions have laws which refer to BIOT or treat it as one of the overseas territories. Amendments to those laws may be necessary to reflect the new status of Diego Garcia.

I see that the noble Lord, Lord Lansley—as is becoming classic in his contributions on these occasions—has read the report from the DPRRC. His Amendments 51A, 51B and 51C appear to seek to implement its recommendations. Amendment 51BA, tabled by the noble Lord, Lord Lilley, appears to be less consistent with the recommendations—I think he has recognised that in his remarks—in that it would impose the affirmative procedure in respect not just of Orders in Council, which amend primary legislation, but of those which amend secondary legislation. Without showing too much leg so late at night, we are still considering these suggestions and we will return to them on Report. With that, I hope noble Lords will not press their amendments.

[Lord Callanan (Con)]

I thank the noble Lord, Lord Lansley, and others who contributed to this group. I am grateful to the noble Baroness for her reply to my amendments. I appreciate that they are technical and relate to the prerogative, but they are important none the less.

In essence, we seek to understand whether the Government believe that Clauses 3 and 5 will limit the prerogative in any way because as we see from the drafting of the Constitutional Reform and Governance Act 2010, which we discussed earlier, this has effectively ended the Government’s adherence to the original Ponsonby rule. Statute is so often deficient when compared with convention. As in the case of the prerogative, statute should not limit the prerogative without very careful consideration.

I am grateful to the Minister for her reply. Given the complexity of these issues, I hope she will write to us to set out the impact of the Bill on the prerogative before we proceed to Report. In the meantime, I will, of course, study her reply in Hansard. Obviously, we reserve the right to return to any unresolved issues on Report.

Clause 2 agreed.

--- Later in debate ---

There is an amazing lack of self-awareness on the part of this Government. So ideologically wedded are they to their perception of past colonial wrongs that they do not see how the Bill looks to the British voter. They are spending millions on this deal, giving these millions to Mauritius, a country with a hugely corrupt governing class, while at home, tomorrow, the Chancellor is going to raise taxes on hundreds of thousands of British voters.

[Lord Callanan (Con)]

My Lords, I thank the noble Baroness, Lady Hoey, for moving this amendment, my noble friend Lord Hannan for his excellent speech and my noble friend Lord Leicester, who also made some very good points.

Amendment 47, from the noble Baroness, Lady Hoey, gets to the core of a problem that the Government have so far avoided. When we originally considered passing a Motion requiring the Government to consult the Chagossians, which the Government were totally against, Ministers resisted it, not only because they felt that a consultation might be subject to judicial review but because the challenge of defining the Chagossian community presented challenges.

We have heard throughout our debates on the treaty that the UK Government have mistreated the Chagossians, not least through their forced removal from the Chagos Archipelago. The Government have gone some way to recognising this through the establishment of the trust fund. Does the Minister consider the creation of the trust fund for the Chagossians as the end of the matter, or will her department continue to look at further ways to support the displaced Chagossian community?

This amendment would require the Secretary of State to produce a report projecting the population growth of the Chagossian people over the next 30 years and to assess the implications of the outcome of the report for recognition of their identity. If we are to properly support the Chagossian community, as we believe we should, it is important that the UK Government make a proper effort to understand the community, its growth over time and where Chagossians have chosen to live. Will the Minister take this on board and look closely at ways in which the UK Government can improve their understanding of the Chagossian community? I look forward to hearing her response.

[Baroness Chapman of Darlington (Lab)]

My Lords, I have said repeatedly throughout these deliberations that the Government are very interested in thinking about different ways of working alongside the Chagossian community on these issues. That applies to Amendment 47 as well.

The noble Baroness, Lady Hoey, asks the Government in her amendment to produce a report consisting of a demographic study of the Chagossian community. I am going to have to disappoint her this evening. It will not be possible to produce a useful report, at a cost to taxpayers, in time for it to do anything of consequence alongside this treaty. It is not a bad idea to have a report such as this, for many of the reasons that have been described. I would not be against it. What I am saying is that the responsibility for conducting the study does not belong in this Bill, but that does not mean it is a bad thing to do in principle. The noble Baroness will know, as we have heard most recently from the noble Earl, Lord Leicester, about the IDRC leading a report into the Chagossians, which I hope will be published soon. I hope that all these things will help to mitigate some of the noble Baroness’s concerns.

I saw that Jeremy Corbyn had also written to the noble Lord, Lord De Mauley, wo chairs the IRDC, which is responsible for the survey. It is not something that the Government are responsible for. We are looking forward to the results. We were asked what weight we put on the survey. It is for the committee to determine that. I am sure that it will take on board the comments that have been made by those who are concerned about how the survey has been conducted. I know that some Chagossians would be completely unable to access a survey such as this, for reasons of literacy or access to the means by which the survey is being conducted. I am sure that the committee will want to reflect on that. We certainly will when we receive its report. I look forward to it and hope that it is useful in assisting us to understand the complexity of opinion that exists within Chagossian communities.

On the substantive point that the noble Baroness raises, such a piece of work may well be useful, but I am not able this evening to commit the Government to commissioning it. With that, I hope that noble Lords will not press their amendments.

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[Lord Purvis of Tweed (LD)]

No, the case that the noble Lord was making passionately was about the faults in the CRaG process, and I agree with him about that. It is just that if he had not had his view, with his noble friends, in 2021, we would have had the enhanced processes for treaty scrutiny.

However, we are we are because the current Government were supportive of changing the CRaG process for up-down votes on treaties, and now they are against. The Opposition, who had been against then, are now in favour of it. It probably has to do with whoever is sitting on the government side of the House, rather than the opposition side, but we are where we are now. The issue is how we go forward, to some extent. That is not denying that there is still Report stage, and there will still be divisions potentially, but I wanted to flag at this stage, in Committee, the proposal to try to address some of the major concerns.

Before briefly addressing that specific part of the amendment, I want to put something on record, as there have been quite a few allusions today to the notion that the negotiations on this treaty were halted by the previous Administration. In a letter to the Foreign Affairs Committee from the noble Lord, Lord Cameron of Chipping Norton, on 5 April 2024—just seven weeks before the Dissolution of Parliament—he reaffirmed that negotiations were ongoing and that questions on the future administration of the islands were subject to the ongoing bilateral negotiations between the UK and Mauritius. He also said in the letter:

“We will continue to update Chagossians as negotiations progress”.


The negotiations were ongoing at the time of the election. It is worth stating that on the record, because there has been quite a bit of misleading information today. It is interesting that the Foreign Affairs Committee had been making the case since 2008 for a strong moral case for resettlement. That was denied again in the letter from the Foreign Secretary in April 2024.

We have a moral duty to try to ensure that, whatever circumstances arise from the parliamentary proceedings, we have a mechanism by which we allow the Chagossian community to be represented. Through Amendment 80, my proposal is for an inter-parliamentary committee, with MPs from the Republic of Mauritius and MPs from the UK forming a committee for the duration of the treaty. We know, and I agree with much of what has been said today, that trust is low to non-existent among many in the Chagossian community and suspicion is very high. I acknowledge all of that. A means by which that can perhaps be addressed as the treaty is implemented, if it is brought into force, is one where UK and Mauritian parliamentarians, through dialogue, debate and mutual understanding, can observe and scrutinise their respective Executives. Back in their Parliaments, they can scrutinise how the treaty is operating, the implementation of the treaty, whether rights of return are being implemented, the right to self-determination as understood in customary international law, and access to compensation, resettlement and other forms of support.

The commission in the treaty is executive but this would add a parliamentary oversight function, which I believe would be of value. I hope that the amendment will receive cross-party support. I am open to discussing its particular wording, but I hope that the principle will receive support. We owe a moral duty to that community for ongoing representations to address their concerns and suspicions. I therefore beg to move Amendment 80.

[Lord Callanan (Con)]

My Lords, this is the last group of amendments in Committee. I am delighted to see so many noble Lords opposite taking a close interest in the Bill and what it will do to the Chagossian people. I am delighted that they are taking an interest in what their Government are finally doing to the Chagossians.

I have already spoken to my noble friend Lord Lilley’s amendments, which are similar in drafting to those of the noble Lord, Lord Purvis of Tweed. I must say that I prefer my noble friend’s amendments to his Amendments 80 and 82, principally because they include reference to a referendum of the Chagossians. My noble friend the Earl of Leicester has talked about how deficient the current survey being undertaken by the International Agreements Committee is. I think that we could greatly improve on that, but the best mechanism would be simply to hold a referendum of the Chagossians asking them whether they approve of this treaty.

I know that the Liberal Democrats were previously very supportive of a referendum, but, despite criticising the position of my party, this amendment implies that they may not now be so supportive. I hope to see information to the contrary from the noble Lord, Lord Purvis. His amendment also differs from my noble friend Lord Lilley’s, in that it would apparently come into force after the treaty, whereas that of my noble friend would come into operation beforehand, which seems much more appropriate. I am of course happy to take up the offer of the noble Lord to discuss the wording of amendments because, as is so often the case in your Lordships’ House, we bring about improvements to a Bill only if we work together. I am certainly prepared, from my point of view, to work with him on the drafting of these amendments. I hope my noble friend Lord Lilley would be involved as well, so we can get them into a form where we can support them on Report and ask the Government to move on this.

[Baroness Chapman of Darlington (Lab)]

My Lords, I thank the noble Lord, Lord Purvis, for the considered and balanced contribution that he has made throughout the Bill but particularly on his Amendment 80. The amendment is interesting, and I understand the effect that he is seeking to achieve. It is a welcome addition to our debate today. As I said to the noble Lord, Lord Lilley, earlier, I will also take Amendment 81K into consideration in the comments that I am about to make.

The proposal put forward by the noble Lord is a novel one. I could not recall any examples of where there have been joint committees set up between different legislatures in this way, but the noble Lord, Lord Purvis, mentioned some, and I will reflect on those to see whether there is anything we can glean from them that might be useful.

The noble Lord, Lord Purvis, has made some changes to his amendment, but, unfortunately, we still cannot accept it in its current form today. The structure is not something that the treaty with Mauritius was drafted to contemplate. Of course, there is nothing to prevent parliamentarians in the UK engaging with their equivalents in Mauritius on these matters, but we do not see this as being a matter for domestic legislation in the way that we are considering it at the moment because, obviously, that does not have any effect on what the Mauritians themselves do.

Some elements in the noble Lord’s proposed scope for a joint parliamentary commission seem to be very much for the UK alone, so we could look at them. The Government are committed to building a relationship with the Chagossian community that is based on respect. As noble Lords will be aware, we have established a Chagossian contact group to give Chagossians a formal role that shapes decision-making on the UK Government’s support for their community. We are also providing additional support to build the capacity of community groups so that more are eligible for grants.

There are two elements in the amendment that are an issue for the Government and that we will disagree on at the moment, and those are the right to self-determination and compensation. On self-determination, we have been over this several times in this House and in the other place. To put it simply and plainly, in legal terms no question of self-determination applies. The English courts, noting the conclusion of the ICJ in the 2019 advisory opinion, have proceeded on the basis that the relevant right to self-determination in the context of BIOT was that of Mauritius. On compensation, again it is legally the case that the UK paid compensation to the Chagossians in the 1980s and the English courts in a series of judgments and the European Court of Human Rights have ruled that this settled the claims definitively.

Having said all that, I recognise and understand the noble Lord’s intentions and his determination with this amendment. He has been consistent about arguing along these lines throughout our consideration of this Bill, and I suggest that we meet to discuss his amendment in more detail to see if we can find a way to move this forward ahead of Report. With that, I hope that for today he would be happy to withdraw his amendment.

[Lord Purvis of Tweed (LD)]

My Lords, I am glad there are so many witnesses who saw my ability to bring the noble Lord, Lord Callanan, and the Minister together with some form of consensus at the end of this Committee. I am grateful for both the noble Lord’s and the Minister’s responses. She will know that I have been keen to see the areas where we can move towards formalisation and a degree of statutory underpinning for some structures of ongoing representation, because this is a special case. Even if it was novel—I am sure officials will now be studying all the examples I have given; by the time we get to Report I will try to find some more—I believe it is justified, given the circumstances are in. I am grateful for the willingness to discuss this. There are ongoing debates on the particular aspects the Minister said she had difficulty with. I will happily give way to the noble Lord.

[Lord Callanan (Con)]

I was just going to give him another example, not at British level but at the European level. There is of course the ACP-EU Joint Parliamentary Assembly, which has Members of the European Parliament and all the representatives of the African, Caribbean and Pacific countries.

[Lord Purvis of Tweed (LD)]

I am grateful. We have even got some good elements of Brexit incorporated in this debate as well, so we are on a roll. In the meantime, I beg leave to withdraw, on the basis that we will be returning to this to have what I hope will be constructive discussions with the Minister.