Diego Garcia Military Base and British Indian Ocean Territory Bill

Debate between Baroness Foster of Aghadrumsee and Lord Craig of Radley

Report stage
Monday 5th January 2026 Lords Chamber

[Baroness Foster of Aghadrumsee (Non-Afl)]

My Lords, my Amendment 32 would require a referendum of the Chagossian people, which we have heard about already, before any transfer of sovereignty of the British Indian Ocean Territory could take place. I thank those noble Lords who have added their names to the amendment. I also thank the noble Lord, Lord De Mauley, for bringing us the results from his committee; they have been very instructive to this debate. At its heart, the amendment is very simple. It asks whether a people who were shamefully removed by force from their homeland and who have been denied a voice that the rest of us enjoy should be finally allowed to speak for themselves. I believe the answer to that question is yes, absolutely.

Of course, the Chagossian community did not leave their islands by choice. They were removed by the British state and scattered across the world. Since that moment, decisions about their future, and about a homeland they were forbidden to return to, have been taken over their heads, in rooms to which they were not invited. If there was ever a community entitled to the clearest expression of self-determination, it is this one.

The Minister has argued that a referendum could not alter the terms of the treaty, but that is to misunderstand the purpose of this amendment, or indeed any other amendment which calls for the right of self-determination for the Chagossian community. The issue before us is not whether a referendum rewrites international law but whether Parliament is prepared to authorise the transfer of sovereignty without the consent of the people most directly affected by it. This House has both the historic right and the responsibility to insist that consent comes first.

We have already heard that the UN Committee on the Elimination of Racial Discrimination published its opinion on 8 December. That is something new in the international sphere that we hear so much referred to in this House. It gives its opinion on the process of this treaty and some of its contents, especially in relation to the explicit prevention of the return of the Chagossian people to their ancestral lands in Diego Garcia. In relation to the process which the Government have engaged in, the committee said that the lack of meaningful participation of the Chagossian people is

“affecting their rights and lands, restricting the exercise of their right to self-determination”.

The UN committee clearly believes, despite all that we were told in Committee, that Chagossians have a right of self-determination. I would be very much obliged to hear from the Minister on this specific point when she responds.

I also worry greatly that to proceed without consent from the Chagossian people would establish a deeply troubling precedent—one that I know is already feared by other populations across our cherished overseas territories. If sovereignty of one overseas territory can be transferred without the freely expressed will of its people, then no territory can be entirely reassured. Self-determination cannot be conditional on convenience or on the balance of diplomatic pressure exerted on the UK by a coalition of our adversaries, either through an international court issuing a non-binding advisory opinion or by other means.

In all other parts of our British Overseas Territories, there is a simple principle that is acknowledged by everyone: people get to decide their own future. But the Chagossians are told that this principle does not apply to them because they are not a permanent population. That argument cannot possibly stand because it was our Government who made them not a permanent population; the UK Government ensured that they could not be. To deny them self-determination on that basis is to compound a historic injustice with a present one.

Of course, the Government will be aware that there is now a Chagossian Government in exile. Denied a voice yet again by a Government who trumpet their respect for international law, the Chagossians have now elected their own leader here in the United Kingdom—a Government in exile, if you will. Surely our Government must now acknowledge that they have got it wrong in not seeking the views of Chagossians before handing away their homeland to Mauritius.

What is striking is that the Chagossian community are united in a call for a referendum. The Minister will refer to a broad range of views on sovereignty within the Chagossian community, and that is absolutely true, but the Chagossian community has consistently referred to the right to self-determination, whether they live in the UK, the Maldives or the Seychelles. The Chagos Refugees Group, which seems to be the only group that the UK Government engage with, has only ever called for self-determination. Similarly, the UK Chagossian groups, including Chagossian Voices, BIOT Citizens and others, have echoed that call. Across generations and across the diaspora, they are asking for the same thing: not special treatment but equal treatment; not a veto over foreign policy but a voice for their own destiny.

Taking that wide range of views into account—a point repeated frequently by the Minister in this place, and in the other place—it is clear that this amendment does not dictate the outcome of a referendum. It does not presume what the Chagossians will decide, as the noble Lord, Lord Hannan, has said. It simply says that they must be asked, and the answer must matter. If we are serious about self-determination and believe that it is a principle, not a slogan, then we cannot exempt the Chagossians from it. I urge the House to support this amendment in a cross-party spirit and affirm that no people, especially one wronged so grievously by the UK Government, should be denied the right to decide its own future.

In closing, I refer to Amendment 33 on “Referendum No. 2” in the name of the noble Lord, Lord Purvis. While, of course, I believe my amendment is better as it is a condition precedent to the treaty being implemented, I will also support his amendment because, as we say in Ulster, half a loaf is better than no bread. Despite that, I hope noble Lords will support Amendment 32.

[Lord Craig of Radley (CB)]

My Lords, I regret that I missed the opportunity to add my name in support of Amendment 32 from the noble Baroness. It is remarkable and significant that there is sufficient interest in the Chagossian community, after so many years since they and their forebears were evicted, to form with due process a Government in exile. I have already exchanged emails with the nominated First Minister, Mr Misley Mandarin.

The Minister was perhaps too optimistically dismissive in Committee when she suggested that there was insufficient Chagossian presence on the atoll to form or justify an independent authority. There is none there; they were evicted in the 1970s. There is also the recent finding of the UN Committee on the Elimination of Racial Discrimination to consider. Have the Government considered whether this might influence the thinking and advisory findings of the international court, which triggered this Government’s search for a long-term arrangement for Diego Garcia as a military base?

I note that the other far neighbour of the Chagos Archipelago, the Maldives, has raised seemingly legitimate human rights concerns about the Government’s methods of rushing these matters through this House. The number of amendments on Report is a reasonable measure of the many concerns held in this House. Though the treaty has been agreed, I urge the Government to proceed at a measured pace to allow these many concerns to be properly and fully considered. Will they reassure the House that there is no set time limit for these national procedures to be considered, as, if they were to be conceded, it might invalidate the treaty as signed on 22 May 2025?

Diego Garcia Military Base and British Indian Ocean Territory Bill

Debate between Baroness Foster of Aghadrumsee and Lord Craig of Radley

Committee stage
Tuesday 18th November 2025 Lords Chamber

[Lord Craig of Radley (CB)]

My Lords, I will speak to Amendment 53 in my name and that of the noble and gallant Lord, Lord Houghton of Richmond, who unfortunately cannot be here this evening. It is clearly a probing amendment to give the Committee an opportunity to consider the implications for the UK of another possibility affecting Article 11, the economic partnership of the treaty. That possibility is that, within the 100 years-plus of the treaty, the Diego Garcia military base might become unusable, due to natural causes or because of a sea level rise triggered by global warming. While the loss of use would have military consequences, due to the wording of the treaty the UK’s financial obligations to Mauritius would appear not to be affected.

As I mentioned at Second Reading, the treaty makes some valiant assumptions about the steadfastness of relationships between the countries concerned. That aside, it would be helpful to understand why, if only as a precautionary principle, no mention of this possibility —the functional failure of the base—or how it might be handled is covered in the treaty. I assume that the possibility was considered by His Majesty’s Government and the United States in their preparations for negotiation. Can the Minister confirm this? Was it decided, based on historical records, that the risk of an earthquake, tsunami or other natural cause was so remote that these need not be considered?

Indeed, in his response in the debate on 30 June, the Minister mentioned that, like all small atoll islands, it is naturally dynamic. While not wishing to speculate on future erosion, he said that scientific surveys had concluded that the overall natural land area of the island had decreased by less than one per cent over the last 50 years. But what about sea level rise? There is a widespread presumption that sea levels will rise in the future. The amount of rise, its timing and spread in the world’s oceans is still speculative, but, based on realistic IPCC global warming projections, estimates for the Chagos atoll indicate rises that would impact on the functioning of the Diego Garcia base. They suggest that, within 100 years of the treaty, the runway and hard standings will not be covered, but some of the domestic and fuel storage areas could become submerged, either intermittently by diurnal tides or on a permanent basis. There could also be difficulties with quayside berthing and the present availability of fresh water. This is but a résumé of findings that were sent to FCDO officials in January, before the treaty was signed in May this year.

Maybe the United States, having done its own assessment, believes that it will be possible gradually to strengthen the sea defences as necessary to maintain the base’s operational capabilities. It would be helpful if the Minister could indicate what assessments the United States has made of sea levels. Looking at the wording of the treaty, as I mentioned at Second Reading, there will be the opportunity to attempt to resolve any issue about payment by the arrangements for settling disputes contained in it. But, whatever arrangement might be accepted by both parties today, it does not follow that the same consensus might be possible later, due to changes in the individuals and their perceptions then. There seems therefore to be good reason to have an agreement with Mauritius now, before ratifying the treaty, on how the eventuality of the base becoming unusable would affect Article 11.

[Baroness Foster of Aghadrumsee (Non-Afl)]

My Lords, I rise very briefly to commend the noble and gallant Lord on his amendment. It is an incredibly sensible amendment that should not be contentious because, if there are difficulties arising out of natural causes or disaster, it would be unthinkable for His Majesty’s Government to have to continue to pay large sums of money to the Government of Mauritius. I hope that that will be taken on board.

Secondly, I will refer to the treaty, which, at Article 11, talks about the economic partnership between the United Kingdom and Mauritius. There are three parts to that. The first is the annual sum that has to be paid: there has been lots of conversations around what that is and what it might amount to. The second is the trust fund, which the Minister knows I take a particular interest in and which we will discuss in the eighth group of amendments. The third is the multiyear funding as part of a development framework for projects to be undertaken by the Mauritius Government across 25 years. We have heard very little about this multiyear funding. I wonder whether the Minister could elucidate that and give us some details in relation to what that is and what it is thought to be. In the treaty, it says that the amounts, payments and modality for all those three issues will be agreed separately. So it is important for the House to have some clarity in relation to that and I look forward to hearing from the Minister.