Diego Garcia Military Base and British Indian Ocean Territory Bill

Lord Coaker Excerpts

Committee stage
Tuesday 25th November 2025 Lords Chamber

[The Minister of State, Ministry of Defence (Lord Coaker) (Lab)]

My Lords, I thank the noble Lord, Lord Lilley, and the noble Baroness, Lady Goldie, for their amendments. I appreciate that they have questions about how the treaty protects the full operation of the base, and I want to reassure them that the treaty enables the continued operation of the base to its full capability. The treaty and the Bill we are debating today will have zero impact on the day-to-day business on Diego Garcia. Importantly, it will not reduce our ability to deploy the full range of advanced military capabilities to Diego Garcia. I am putting some of this on the record, and the noble Baroness, as a former Defence Minister, will know the careful calibration of the language that I am using: I am putting it on the record so that we are all clear.

As I say, noble Lords will understand that I pick my words with care in this particular context. I cannot and will not discuss operational matters on the Floor of this place, but I am confident that the Chamber would not necessarily want me to. The long-standing UK position of neither confirming nor denying the location or presence of nuclear weapons must stand. But let us talk about the hypothetical. The amendments from the noble Lord, Lord Lilley, and the noble Baroness, Lady Goldie, concern the application of the Pelindaba treaty. Mauritius is a signatory, as the noble Lord, Lord Lilley, and the noble Baroness said, to the treaty. The UK is not a signatory to the treaty but is a signatory to Protocols 1 and 2. I can confirm to the Chamber that the Governments of the UK and Mauritius are both satisfied that the Diego Garcia treaty is compatible with these existing obligations.

I also remind colleagues, because this is important—again, I think the noble Lord, Lord Lilley, if I remember rightly from his remarks, and, indeed, the noble Baroness raised this—that we are not alone in the matter. The Government of the United States have also tested all aspects of the Diego Garcia treaty in depth and at the highest levels of the security establishment. They, too, are satisfied that it protects the full operation of the base. Indeed, when I was talking about the earlier amendments in answer to that, I quoted the remarks of Secretary of State Marco Rubio and his comments about being satisfied with the treaty in every aspect.

Amendments 63 and 88 therefore are not necessary. We do not need a review of the impacts of nuclear treaties on the future operation of the base, as the noble Lord, Lord Lilley, has proposed, because the future operation of the base has been protected. I say to the noble Baroness that we do not need to reopen paragraph 1.a of Annex 1 to the treaty, as has been suggested, because this already provides for unrestricted —that is the key word—access for UK and US vessels to enter the sea of Diego Garcia. Paragraph 1.b.i provides for unrestricted ability to control the conduct and deployment of lethal capabilities.