Diego Garcia Military Base and British Indian Ocean Territory Bill

Debate between Graham Stringer and Al Pinkerton

Consideration of Lords amendments
Tuesday 20th January 2026 Commons Chamber

[Dr Pinkerton]

If the right hon. Gentleman will bear with me for two minutes, I will get to precisely that point.

It is shameful that a meaningful referendum was not the starting point of this Government’s approach, which left Opposition parties to insist on it through amendments. It is equally shameful that this principle has today been rejected on the grounds of cost. What price do the Government place on self-determination? Among Chagossians, this will be received for what it is: justice layered upon injustice.

This Government, and Governments before them, have routinely defended our overseas territories in the international arena on the basis of the self-determining rights of their citizens. Today, this Government rightly defend Greenland on that same basis, asserting the right of Greenlanders to determine their own future. It is therefore with deep regret that I speak in support of that right and of that principle as expressed through Lords amendments 2 and 3, knowing that we will have no opportunity to vote in favour of those amendments when a Division is called.

In respect of accountability and oversight, Lords amendments 5 and 6 would reinforce Parliament’s role in scrutinising the financial commitments of this agreement. They would ensure that the House is not asked to authorise long-term expenditure without clarity on its scale, duration and assumptions. The amendments would require transparency in the way in which costs are calculated, and ensure that Parliament retains control over future payments. That is not obstruction; it is a proper exercise of parliamentary responsibility, and one owed to future Administrations and to the public. The amendments would also give the Government a mechanism to terminate the deal and all future payments to Mauritius should Mauritius fail to honour its obligations.

In May, the Prime Minister said that the deal would cost up to £3.4 billion over 99 years. However, freedom of information disclosures suggest an initial estimate closer to £34.7 billion, a figure that we have already heard today. That disparity risks further undermining trust in this Government, and confidence in their wider approach to public spending. At a time when families across Britain face cost of living pressures, Parliament is entitled—indeed expected—to demand clarity before committing taxpayers to potentially vast long-term liabilities that will endure well beyond any of our lifetimes.

In respect of security and durability, Lords amendment 1 addresses the strategic importance of Diego Garcia, and would ensure that the United Kingdom is not locked into ongoing payments should the military use of the base become impossible. Given the rapidly shifting nature of the United Kingdom’s relationship with the United States, particularly under its current President, the amendment is essential to ensure that we are not bound into a long-term lease without a similarly long-term tenant. No one in this House or the other place disputes the strategic importance of Diego Garcia to our national security, and to global security more broadly. The amendment reflects that reality, and raises legitimate questions about the long-term viability of this deal.

Let me now return briefly to Lords amendments 5 and 6, which together form a coherent and, in my view, proportionate package. They would reinforce parliamentary oversight, protect the public purse, and hold the Government’s financial commitments to account. The other place has not sought to frustrate the Bill; it has asked whether Parliament is prepared to proceed without sufficient safeguards on cost, governance and legitimacy concerns.

I again place on record my disappointment that Lords amendments 2 and 3 were not selected for today’s debate. They would have provided the Chagossian people with a referendum, allowing them a direct and meaningful say over their future—something that remains conspicuously absent despite repeated assurances about consultation.

The Chagossians are not, and should not be, diplomatic collateral. They are not a note in the marginalia of an agreement between Mauritius and the United Kingdom. They are a people who have been treated badly by our country and are now deserving of agency, dignity and justice. For those reasons, the Liberal Democrats urge the Government to accept Lords amendments 1, 5 and 6. More than that, however, we urge the Government to pause, to reflect on the changing geopolitical circumstances in which we find ourselves, and to think again about whether this is the right approach for us, for the Chagossian people, and for our future security.

[Graham Stringer (Blackley and Middleton South) (Lab)]

It has been said that some hon. and right hon. Members have come to the debate on Chagos late in the day. That is right. The right hon. Member for Islington North (Jeremy Corbyn) has been banging on about Chagos for decades, and I admire him for doing so. I first became concerned when I saw how much it would cost the United Kingdom to pay for something that we own. As a litmus test, I asked myself whether I could explain to my constituents why we are going to pay an island nation that has no direct connection with Diego Garcia.