Diego Garcia Military Base and British Indian Ocean Territory Bill

Debate between Lord Kerr of Kinlochard and Baroness Hoey

Committee stage
Tuesday 25th November 2025 Lords Chamber

[Lord Kerr of Kinlochard (CB)]

I respect what the noble Lord says and he knows what he is talking about. I also respect what the noble Baroness, Lady Goldie, asked for in requesting four statements. We should be asking for statements rather than changes to the text of a treaty. We voted in July for the ratification of this treaty; we cannot ratify the treaty until we pass this Bill, and we should pass the Bill.

[Baroness Hoey (Non-Afl)]

My Lords, I wish to speak to my Amendment 54. I must say to the noble Lord, Lord Kerr, that I think we are all pleased that we are where we are. It seems very strange to say that we cannot be discussing the Bill—that was almost the way it was put.

My amendment really follows on a little from what the noble Lord, Lord Weir of Ballyholme, talked about. During Committee in another place, concerns were expressed that other countries may seek to lease individual Chagos Islands and reference was made to reports that India and China were in consultation with the Republic of Mauritius. At that time, the Minister of State at the Foreign, Commonwealth and Development Office, the honourable Member for Cardiff South and Penarth, responded robustly. He stated:

“I want to say on that point that this is absolute nonsense. Is the shadow Minister willing to provide any evidence that that is going to take place? This treaty protects the security of the outer islands and expressly prohibits foreign forces building bases on them—something on which her Government did not succeed in their negotiations”.—[Official Report, Commons, 20/10/25; col. 686.]


What is this great protection to which he referred?

Noble Lords will find that in paragraph 3 of the first annex to the Mauritius treaty. It states:

“In accordance with this Agreement, in respect of the Chagos Archipelago beyond Diego Garcia, Mauritius agrees”—


this is point d—that,

“except in circumstances of necessity for a response to a humanitarian emergency or natural disaster in instances where the United Kingdom or the United States of America is unable or unwilling to provide such a response, Mauritius and the United Kingdom shall jointly decide on authorisations permitting the presence of non-United Kingdom, non-United States or non-Mauritian security forces, either civilian or military”.

I cannot see anything there to validate the Minister’s assertion that the treaty

“expressly prohibits”

foreign forces building bases on the islands. What it says is that they cannot do so without the agreement of the UK Government.

For me, this presents two real concerns. First, and most importantly, there is nothing in the treaty to provide any kind of safeguard in relation to the leasing of islands for purposes other than security and defence. This would leave the door wide open for other countries to seek to lease the islands, ostensibly for purposes other than security and defence. The argument made by the Minister in the other place was that the suggestion that there was a problem was nonsense. It seems to me to be very well founded. The extraordinary thing about these provisions is the fact that they relate to islands of immense geostrategic importance, yet the protections in relation to them are effectively non-existent. That seems very complacent to me.

There is nothing to prevent a hostile country leasing an island and either combining security and defence purposes with others, in the hope of hiding the former, or on beginning with non-security and defence purposes and then changing over to them. Can the Minister tell me how that could be prevented? What would happen if an island is leased for non-security and defence purposes, yet it subsequently becomes apparent that it is being used for those purposes and that the country has dug in well and has no intention of relinquishing the islands? How could they be dislodged? Would the Minister here like to respond on that? I found the suggestion from that Minister in the Commons that there are no presenting difficulties quite alarming. It suggested a certain otherworldliness with a high degree of disconnection from political reality.

Secondly, the other difficulty is the completely opaque nature of the protection that is provided and the lack of parliamentary scrutiny. At the moment, we would have no knowledge about when or if approaches were made by the Republic of Mauritius to seek UK agreement for other countries to use other islands, and we need to know that. My Amendment 54 would address this concern by requiring the Minister to develop regulations stating that before the UK can agree to a proposal from the Republic of Mauritius—made under Annex 1(3)(d) of the treaty—that any island other than Diego Garcia be used for security and defence purposes by another country, that proposal must be brought to Parliament and endorsed by a vote of both Houses. Will the Minister give me a reason why that should not happen?

In ending, I will ask at this stage about the point made in the debate on the fourth group about whether the Government were asked to give their consent before the deal between Mauritius and India was done. I am not sure that we got a response to that. It was going to give India a defence presence. I would really like to know how long the Government knew before that happened. Did they know and when did they agree to it?