Diego Garcia Military Base and British Indian Ocean Territory Bill

Debate between Lord Bellingham and Lord Morrow

Committee stage
Tuesday 25th November 2025 Lords Chamber

[Lord Bellingham (Con)]

My Lords, following on from the noble Lord, Lord Beamish, surely the fundamental difference with the two bases on Cyprus that he mentioned is that we kept them in perpetuity—they are sovereign bases. Yes, we have an arrangement with the Cypriot Government to inform them of activity after deployment takes place, but what concerns me about this particular lease arrangement is very simple.

At the moment, we have in place a Government in Mauritius headed by His Excellency Navin Ramgoolam, who is a democrat and a friend of his country. I had the privilege of meeting him a number of times when he was premier before. Indeed, he took over from a Government who were also democratic and had all the right intents. We had many arguments about this issue but, fundamentally, we were two democratic Governments discussing a matter.

The concern I have is this: what would happen if there were some sort of coup or a military Government in Mauritius? In these worst-case scenarios, we have to be prepared for the future. Let us hope for the best but prepare for the very worst. Could the Minister comment on what would happen to these arrangements in the treaty in that event? If, indeed, a military coup took place and an alliance was made with a hostile power, the operations of this base could be jeopardised.

[Lord Morrow (DUP)]

My Lords, I wish to speak to Amendments 20G and 20H in my name. I have tabled them because I want to probe more deeply whether the consequences of non-ratification are such that non-ratification is not an option.

Furthermore, it is important that we are clear about what we can and cannot do. The Minister has told the Committee that the treaty is a done deal; that it cannot be changed; and that the role of your Lordships’ House in relation to it and to the Bill before us today is really very limited. The noble Lord, Lord Purvis, has supported the Government in this view, suggesting that, going forward, there is only scope for possibly impacting the details of the implementation. It is clear that, although the CRaG process did not prevent the Government ratifying the treaty, the treaty was defined between the UK Government and the Republic of Mauritius in terms that place not only a clear distinction between the act of signing and ratification but unusual distance between the two, in that the treaty cannot come into focus unless and until the Bill before us today is passed and Clause 2 transfers sovereignty.

The comments of the noble Lord, Lord Murray, on day one in Committee were important. He said:

“Because of the way the treaty is drafted and the way Article 18 operates, the treaty can come into force only when this legislation is implemented. That is unusual”.


After an exchange, the Minister helpfully clarified the situation further and said:

“Before the UK can ratify the treaty, we will need to do the following: pass both primary and secondary legislation, update the UK-US exchange of notes, and put in place agreements on the environment, maritime security and migration”.—[Official Report, 18/11/25; cols. 708-13.]


In this context, it is clear that, although the treaty has been negotiated and cannot be changed without reopening negotiations, it has been defined in terms to which both parties consented. This means that what could be drawn from the act of signature on 22 May was, by definition, inherently provisional and contingent. It was signed subject to recognition that the act of signing did not bring the treaty into force; and that the treaty would not come into force unless and until the respective political processes of both countries had been properly honoured. In this context, because the coming into force of the treaty depends on an Act of Parliament, this is plainly not a done deal, in my estimation.

Furthermore, as a legislature on its toes, we have to let the Executive know that we understand that, having negotiated the treaty, they will encourage us to pass this legislation so that it can move to ratification. We know that this does not mean that we have to pass this piece of legislation any more than we have to pass any other piece of legislation. If we reject this Bill, the islands could not be given to Mauritius. If the Government chose, they could then invoke the Parliament Act, which would delay things by some 13 months or thereabouts, in the context of which there is a good chance that common sense would prevail. The Republic of Mauritius could not object to this because it signed up to the treaty knowing that it depended on domestic processes that, in this case, require the passing of legislation through a legislature that cannot be dictated to by the Executive. It is really important that we are open, transparent and honest about the opportunity that we have both to stand up for the Chagossians and to say no to this treaty because, if we have the power to do so, we have the responsibility to do so. That is, I think, is of equal importance; it may even be more important.