Diego Garcia Military Base and British Indian Ocean Territory Bill

Al Pinkerton Excerpts

Committee of the whole House
Monday 20th October 2025 Commons Chamber

[The Second Deputy Chairman]

I call the Liberal Democrat spokesperson.

[Dr Al Pinkerton (Surrey Heath) (LD)]

I will speak in support of seven amendments tabled in my name. For too long, decisions about the Chagos islands have been made without the consent of Chagossians. My grave concern is that the treaty to be given effect by the Bill fails to rectify that historical and ongoing injustice. Not only does it fail to provide adequate protection of their rights, it fails to establish a legally binding right to return or a binding programme of resettlement of the islands for Chagossians.

Turning to amendment 9, we recognise and support the importance of abiding by international law and believe that the UK was indeed right to open a process of negotiation with Mauritius—especially so given the risk that a judgment against the UK in any court could threaten our sovereignty over and security interests in Diego Garcia and the wider Chagos archipelago. However, the treaty that has emerged not only falls short in addressing past injustices, but introduces new injustices of its own.

At the very core of the United Nations charter—a document that this country helped to shape—lies the right of all peoples to self-determination. Article 1(2) could not be clearer: one of the purposes of the United Nations is to

“develop friendly relations among nations based on respect for the principle of equal rights and self-determination of peoples”.

Yet for the Chagossian people that right has been denied for more than half a century. They were exiled from their homeland in the Chagos archipelago, scattered across the globe, and left without the means or permission to return. It was, and remains, a moral stain on our modern history.

[Jeremy Corbyn]

I absolutely agree with the hon. Gentleman about the lack of morality in how the Chagossian people were treated—he is correct on that. Would he accept that there was something fundamentally wrong in 1965 in separating Diego Garcia and the archipelago from Mauritius when the whole area had always been administered from Mauritius as part of Mauritius, and that under decolonisation statutes they should have been included in the independence of Mauritius at that time?

[Dr Pinkerton]

I am grateful to the right hon. Gentleman for his intervention. I am aware that he has a long history in advocating for this particular cause, but I am relentlessly surprised by the position he takes on this point. He would seek to effectively reinscribe the colonial construction that was British Mauritius and in doing so ignore the right of Chagossians as a people to self-determine their own future. I do not see the colonial convenience of administration as anything other than overwriting a people’s right to determine their own future.

On that point, in 2019 the International Court of Justice issued an advisory opinion that concluded that the decolonisation of Mauritius had not been legally completed and that the United Kingdom should end its administration of the Chagos islands as rapidly as possible. The General Assembly subsequently endorsed that same view. But I say to this House that the ICJ opinion, however well intentioned, poses a profound problem. It proposes to hand sovereignty not to the Chagossians themselves but to Mauritius, without consulting those who were born of the islands or who are descended from them. That is not self-determination but the transfer of sovereignty over a people without their consent. The right to self-determination belongs to peoples, not to Governments. It is not and should not be a device for tidying up the diplomatic ledger of empire, but a recognition that every community has the right to shape its own future. To remove the Chagossians once was a horrific wrong. To barter away their sovereignty now without their voice compounds that wrong.

If we truly honour the UN charter and the principles that this country has long championed, the Chagossians themselves must be placed at the centre of any future settlement. They must have a say over their citizenship, over the governance of their islands and over the prospects of return. The commitment to a referendum that sits at the heart of amendment 9 seeks to address that long and burning injustice by providing Chagossians with the opportunity to exercise their right to determine their own future.

[Chris Coghlan]

I entirely agree with my hon. Friend on the importance of having a right of referendum. I have had Chagossian constituents contact me with their outrage about the compounding of injustice in the new treaty. How realistic does my hon. Friend think it is to find people eligible to vote in a potential referendum, given the length of time that has passed since they were moved from Diego Garcia?

[Dr Pinkerton]

I am grateful to my hon. Friend for his question. He is right that, were a referendum able to be secured, it would be unusual because of the nature of the displacement of the Chagossians. But there have been previous international consultations, and with the collective will and intelligence of a House like this, the terms of a referendum could undoubtedly be negotiated. After all, Chagossians are not backwards in coming forwards and making themselves known to all of us.

For Chagossians, this is not a geopolitical abstraction, but a deeply human matter: one of belonging, fairness and justice. Requiring a report to be made to the House would ensure their voices are not lost amid the technical language of treaties and transfers. Amendment 9 would enable transparency, accountability and, above all, genuine recognition of the rights of Chagossians to self-determination. I encourage right hon. and hon. Members across the House to think carefully when they vote tonight.

New clause 9 speaks to another vital principle: our shared moral duty to protect the natural world. The Chagos archipelago is among the most biodiverse marine environments on Earth. Its coral reefs, migratory species and rich ecosystems are a global ecological treasure and a testament to what nature can be when left largely untouched by human exploitation. In recent months, I have spoken with scientific advisers who are deeply concerned about the Bill’s lack of provisions for establishing and governing marine protected areas. The environment and sustainability institute stresses that very large marine protected areas are vital for global conservation goals. Its research shows the archipelago’s exceptional role in protecting diverse mobile species across the Indian ocean.

New clause 9 would require the Government to publish an annual report produced with the Mauritian Government setting out the progress made in establishing and managing marine protected areas and the meetings held between the two Governments on the issue. Such reporting is critical to ensure that environmental protection does not fade into the sotto voce diplomatic arrangements. It must remain a visible, audible and measurable commitment to international conservation standards. If the Government are to honour their biodiversity beyond national jurisdiction pledge, future Governments must ensure stronger marine conservation, sustainable stewardship and shared responsibility. I believe that the new clause would achieve that.

New clauses 10 and 11 would build on the principle of accountability by ensuring regular oversight of how the Bill and its associated treaty arrangements are implemented. We believe that the Secretary of State should, within 12 months, lay before both Houses a report detailing the expenditure of public funds made under the treaty during the most recent financial year and the progress made by the UK in implementing the treaty’s obligations.

[Chris Coghlan]

At a time when the cost of living is so high, does my hon. Friend agree that the cost of maintaining and operating the Diego Garcia military base and military operations must be evaluated by the House against the expenditure of public funds made under the treaty each financial year?

[Dr Pinkerton]

The maximum possible financial transparency around the treaty arrangements is essential, not least for securing and establishing public trust. I fear that, without those high levels of accountability, public trust would rapidly dissipate. Furthermore, once every financial year, the Secretary of State should present to the House an estimate of the expenditure expected to be incurred in connection with the treaty, including payments or financial commitments to the Government of Mauritius and the cost of maintaining and operating Diego Garcia. If actual payments exceed those estimates, a supplementary estimate must be laid before the House for approval and parliamentary scrutiny. I reassure Conservative colleagues that the Liberal Democrats will support any amendment to the Bill that would increase financial transparency of the treaty.

However, our moral duty extends beyond matters of territory and finance. New clause 12 would require a comprehensive review of the welfare, integration and general needs of Chagossians living in the UK. Many Chagossians here face significant challenges, including housing insecurity, barriers to employment and limited access to public services. The review would assess what support is needed and ensure a full debate in this House and the other place on its findings. That is how we show genuine care for those displaced by the actions of our predecessors in the Chamber and in Whitehall.

Finally, new clause 13 would require the Government within six months to consult with Chagossians residing in the UK and the organisations that represent them on how the Act and the treaty affect their community socially, economically and legally.

[Graham Stuart]

The hon. Gentleman is giving a powerful speech on the Chagossians and marine protected areas, as well as the need for transparency. But it is not just about transparency. What I have not heard from him, on behalf of the Liberal Democrats, is any sense of outrage at the very fact that we are to pay out £35 billion for sovereign British territory on which we have arguably the most important base in the whole Indian ocean.

[Dr Pinkerton]

I am grateful to the right hon. Gentleman for his question. It is precisely in order to cast the strongest possible spotlight on the financial transaction involved that we are asking for financial accountability to be magnified. On his geopolitical point, nobody can question the significant geopolitical importance of the base—it is vital to our national security and to global security. It is essential that it is maintained in British hands, but that must be achieved with the consent of the Chagossians.

The resulting report to be laid before Parliament within 12 months would allow us to evaluate whether the Government’s legislative intent has translated into justice and inclusion in the lives of those who are most directly affected.

These amendments would address critical shortcomings with the Bill. They would embed accountability, environmental protection and a commitment to the right to self-determination within its framework for implementation. I urge Ministers to ensure that the Chagossians are not treated as diplomatic collateral in any future discussions with Mauritius. They are not a footnote to be managed between states; they are a people deserving of justice, agency and dignity.

The Chagossians have waited more than 50 years to go home. The least we can do now is let them decide freely and finally what home means for themselves and ensure that they have the tools they need to exercise their rights. The amendments tabled in my name seek to afford those protections and ensure that those rights are respected.

[Stuart Anderson (South Shropshire) (Con)]

I am delighted to be called so early. I will speak to the amendments in the name of the official Opposition, specifically on the reports going to the Intelligence and Security Committee, especially on security of the buffer zones, foreign security forces, military operations and personnel movements. The ceding of Diego Garcia is a monumental strategic error that will diminish the UK’s standing on the world stage, and I will gladly set out why I believe that is the case.

If anybody thinks they can predict what will happen in the next five years, they have learned nothing from the last five years. When we start extending that to 10-plus years in the current global geopolitical situation, that is so hard to look at. Everybody is playing by a set of rules and working to a past system, which is currently changing.

Strategic leadership is the ability to shape the environment we are in. Let us take two strategic leaders, regardless of our view of them at the moment: President Trump and Xi Jinping. They both want the world to change from where it is, and they want to adjust the shape of what it looks like. The world is currently seeing a disruption to the world order as we know it. The international rules-based order is being challenged. We are setting out a deal and a treaty based on an older system that we being asked to believe will be honoured for the next 99 years, but I do not believe it will be.

--- Later in debate ---

[Dr Al Pinkerton]

It gives me no pleasure to say that this Bill fails the Chagossian people. For decades, decisions about the Chagos Islands have been taken without the consent of those most affected. The treaty continues that injustice, offering no guaranteed right of return, no legally binding resettlement plan and no meaningful protection of Chagossian rights.

The Liberal Democrats support negotiations with Mauritius and support respect for international law, but never at the expense of Chagossian dignity. The treaty, as it stands, lacks transparency, environmental safeguards and accountability for the substantial public expenditure that it entails. That is why we tabled seven amendments to inscribe parliamentary oversight, to protect the marine environment and to uphold Chagossian rights to self-determination. That includes provisions for scrutiny of ministerial decisions, mandatory environmental reporting and a referendum of the Chagossian people themselves. We also called for full financial transparency and a review of the welfare of Chagossians living in the UK, many of whom continue to face hardship as a direct result of their historical displacement. This is not merely a matter of geopolitical assets or territorial claims; it is about justice, belonging and moral responsibility to those who call the Chagos islands home.

I thank the Minister of State at the Foreign, Commonwealth and Development Office, the hon. Member for Cardiff South and Penarth (Stephen Doughty), for the numerous conversations that we have had during the passage of the Bill—he has been generous with his time. I am disappointed, however, that he did not feel able to accept some of my amendments and suggestions during that process.

I will finish with words lifted from the UN charter, a document that this country helped to shape:

“The Purposes of the United Nations are…to develop friendly relations among nations based on respect for the principle of equal rights and self-determination of peoples”.

That right has been denied to the Chagossian people for more than 50 years, so I urge Members across the House to think carefully when voting this evening about whether they wish to compound that half century of injustice or embrace the foundational principles of the UN. [Interruption.] If this House wishes to do the latter, we cannot allow the Bill to pass without ensuring that Chagossians themselves are sovereign over their citizenship, the governance of their islands and the prospect of return. [Hon. Members: “How are you voting?”] I ask Conservative right hon. and hon. Members on my right-hand side, who have lauded the efforts of the Chagossian people but sat on their hands when they had the opportunity to give Chagossians the right to a referendum, whether they wish to keep chuntering from a sedentary position.

In direct response to the Minister, who challenged this in Committee, I say that the forced displacement of a people does not and cannot annul the identity or the rights of the Chagossians as a people. To suggest otherwise perpetuates the disgraces of the past and, as a sentiment, that is unworthy of this Bill and of this House.