Diego Garcia Military Base and British Indian Ocean Territory Bill

Lord Purvis of Tweed Excerpts

Tuesday 25th November 2025 Lords Chamber

[Lord Purvis of Tweed (LD)]

My Lords, I want to say a few words. I have been rather sparing in the Committee debate today, but the noble Lord, Lord Hannan, has prompted me to speak.

I have been a passionate supporter of the Commonwealth Parliamentary Association, I have served on this Parliament’s executive committee of the CPA UK and I have had the great privilege of visiting a great number of Commonwealth nations in all parts of the world, including early this year Malaysia. We have to be very careful, particularly perhaps in this House of Parliament, when we debate a process that has been very difficult on decolonisation. We have to be very cautious with how we approach it and very mindful of the language that we use.

We had 12 years of the Malayan Emergency and I have met the relatives of those who were affected by that. There is not a Commonwealth country that does not have difficult stories, on many occasions. We are still living with this today. I would counsel anybody that, yes, of course, we are free to make any contributions, but we have to be very mindful.

The noble Lord, Lord Bellingham, whom I greatly respect, indicated that perhaps the precedent was this deal. Now, there may be circumstances where a bad deal might be seen by other people as some form of precedent, but I do not think that that is the point that is being made in this group. The point that I hear being made in this group is that the very point of principle that we opened negotiations to cede sovereignty is the precedent. Well, that decision was made in 2022. If we are to see the consequences of decisions taken by a British Government to recognise that negotiations should take place to cede sovereignty, then we have had three years of knowing what the consequences of that will be. I have heard nothing from anybody on this group saying that they have seen the consequences of that decision taken by the previous Administration in November 2022.

[Lord Lilley (Con)]

My Lords, I want primarily—perhaps later—to talk about my Amendments 20Q and 20U, but I will say something about my noble friend Lord Hannan’s Amendment 20L to emphasise one particular precedent he mentioned in passing but seems the most compelling and dangerous. Indeed, in line with the noble Lord, Lord Purvis, I have been rather cautious about discussing this because I did not want to put ideas into people’s heads, but, for two reasons, I will go ahead and talk about it now. First, there is no better way to keep a secret than to pronounce it in the House of Lords; and secondly, as my noble friend Lord Hannan said, there are lawyers in every country looking to see whether this is a precedent that they could use to right some past wrong or to change some past circumstance which they would like changed.

The most compelling comparison is between what we are doing now and the reasons given for doing it and the independence of Cyprus, where we severed off the sovereign bases. They were part of a whole. The territorial integrity of Cyprus was divided between the sovereign bases and the rest. That is exactly what we are accused of doing in the case of the Chagos Islands. It is actually much more true in the case of Cyprus than in that of the Chagos Islands, because Cyprus was always governed as one unit by us whereas the Chagos Islands had separate laws, even if they were transmitted from somebody resident in Mauritius. Therefore, if we are saying that there is compelling reason for us to say we cannot separate the Chagos Islands from Mauritius, of which it has never been part, then surely there are compelling reasons why we should never have separated the sovereign base territories from the rest of Cyprus.

Those bases are hugely important. They played a role time and again in recent disputes and interventions, and in the prospect of interventions in the Middle East. We have been able to help fly from them and intercept missiles from Iran coming towards Israel. In previous conflicts, we used the bases there. They of value not only to us but to the whole of NATO. If we put them at risk by saying to the world that we have no right to have separated them then we would be doing something very foolish.

The only difference I can think of—I am offering a solution to this dilemma, because I do not want the issue of the sovereign bases to be opened up in a dangerous way—is that the decisions in Cyprus were taken before the United Nations General Assembly resolution on which the advisory opinion of the ICJ was based, and therefore it did not apply to them. Of course, advisory opinions are not actually binding—they are wrongly taken as being binding but they are not—but do they apply retrospectively? In many cases when courts rule, they say, “This has always been the case; we’ve only just now ruled it”.

I would like to hear how the Minister proposes to defend the sovereign bases in Cyprus from this precedent. She is obviously not doing this willingly; she is obviously unwilling and she is a wonderful Minister, but she has been given a tough job to do. I would like to hear some justification for this. I do not know whether the precedent in Committee allows me to sit down now and stand up later to deal with my amendments, but assuming I can do that, I will.

--- Later in debate ---

Moved by

[Lord Purvis of Tweed]

80: After Clause 5, insert the following new Clause—
“UK–Mauritius Inter-parliamentary Committee(1) Upon the passage of this Act, a Minister of the Crown must engage with the Government of the Republic of Mauritius with a view to establishing a UK-Mauritius Inter-parliamentary Committee to oversee the implementation and operation of the Treaty.(2) In undertaking the engagement required by subsection (1), the Minister of the Crown must make representations that the composition of the Inter-parliamentary Committee should reflect equal representation from the parliaments of the United Kingdom and the Republic of Mauritius, and that its purpose should be to promote mutual understanding of the provisions of the Treaty through dialogue and debate, including consideration of the operation of the Joint Commission established under Article 12 of the Treaty.(3) The Minister of the Crown must further propose that the Inter-parliamentary Committee’s responsibilities include—(a) monitoring and assessing the implementation and operation of the Treaty;(b) evaluating the recognition and protection of Chagossian rights, including but not limited to—(i) the right of return,(ii) the right to self-determination, and(iii) access to compensation, resettlement, or other forms of support;(c) considering the welfare, integration, and general needs of Chagossians residing in the United Kingdom;(d) assessing progress made in negotiations between the Governments of the United Kingdom and Mauritius relating to the rights of Chagossians; and(e) reviewing any financial arrangements made under the Treaty, including those supporting resettlement, welfare, or the development of the Chagossian community.(4) If the Inter-parliamentary Committee described in subsection (1) is established, within five years of the commencement of the Treaty the Inter-parliamentary Committee must be invited to conduct a review of the operation and effectiveness of the Treaty arrangements.”

[Lord Purvis of Tweed (LD)]

My Lords, I shall speak also to Amendment 82, which is consequential upon Amendment 80. As the Minister referred to before, Amendment 80 had attracted some flattering imitation yesterday, but nevertheless I hope that we might be able to see progress on what I would consider to be a serious proposal to address some of the concerns that have been raised very sincerely. As the noble Lord, Lord Jay, said earlier, we have a lot of history to make good, and I agree.

This has been an unusual Committee stage of a Bill in many respects. Perhaps it is because this legislation and the treaty that it is connected to will have, unlike some other legislation that we often might consider to be indirect, a direct impact on people’s lives. They are a defined but diverse group of individuals who have been in touch with many noble Lords. Therefore, I believe that we have an obligation to treat this seriously. In Committee, there have been many passionate, but also proper and probing, questions on how the terms of the treaty will operate and how UK interests will also continue to be represented. We have just heard that from the noble Baroness, Lady Goldie, and we heard it earlier from the noble Lord, Lord Ahmad.

Amendment 80 in my name is a proposition for an ongoing inter-parliamentary committee for the duration of the treaty. The Minister mentioned before that she felt it was perhaps a novel response. It is not entirely novel; there are precedents which I have based this on. There have been quite frequently free trade agreements that had parliamentary committees associated with them. There is the EFTA agreement, which the UK had been part of. There was the AWEPA for our African partners in parliaments, which we had been part of. There is doubt from many about how critical parts of the treaty negotiated by this Government will be handled, both by the UK and the Mauritian Governments, and operate through the commission.

We have heard many references today to the deeply flawed Constitutional Reform and Governance Act. It was fascinating for me to listen to this debate, because this House in 2021 passed a Motion—it happened to be in my name—about the ability for Parliament to have a straight up-and-down vote on treaties. The House passed an amendment to the then Trade Bill which stated that negotiating objectives or before-treaty negotiations would have to be presented to both Houses, and the House of Commons would have an opportunity to vote on those. I believe that those aspects would have been beneficial for this treaty. I think the noble Lord, Lord Hannan, forgot that he voted against that, so I am happy to remind him, just for the record, that on the latter part—on the first part, he was not in the House—in one of his very first votes in this House, he was against what he has been arguing so passionately for today.

[Lord Hannan of Kingsclere (Con)]

My point is that there has not been a vote in the other place, so the only proper chance is here.

[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.

Amendment 80 withdrawn.