Diego Garcia Military Base and British Indian Ocean Territory Bill

Lord Jay of Ewelme Excerpts

Tuesday 25th November 2025 Lords Chamber

[Lord Hannan of Kingsclere (Con)]

My Lord, I beg leave to propose my Amendments 20L, 20N and 20P. In the interests of brevity and immediacy, I will speak only on Amendment 20L, because I have covered the others in previous groups. This is the amendment that requires the Secretary of State to look at the impact of this treaty on other British Overseas Territories and the implications for their sovereignty.

Of course, we are always told in these situations by whoever is in government, “Oh, it’s a unique situation, you can’t compare”. On one level, that is a truism. Of course, all these situations are unique, yet I think it would be extremely naive not to consider the possibility that they will be fallen upon hungrily by people who want a change to the status quo. The idea that even now there are not politicians and lawyers in Buenos Aires or Madrid looking at the implications of this deal and saying, “How can we press this into the parallel arguments that we have for claims over British Overseas Territories?” is utterly fanciful.

They may already be putting out feelers to British lawyers, who seem very happy to work against the interests of the Crown on these questions. The representative of Mauritius in this case gave an interview in which he gloried in the fact that he lived in a country where you could humiliate the Government. If he is not available, perhaps by then the Attorney-General will no longer be in politics, or indeed perhaps the Prime Minister. They also both have long records of working on cases of this kind.

I suspect that the briefs that will be put in front of them will make the claim that Britain has now, in practice, for all that there was no jurisdiction, for all that it was an advisory ruling, for all that Commonwealth disputes were excluded, conceded this extraordinary and perilous precedent that, if a territory was at one time or another ruled from somewhere else, that establishes the basis of a sovereignty claim. I do not think it is completely fanciful for these elements in foreign countries to feel that they will be dealing with sympathetic elements within the United Kingdom.

Indeed, they have had experience of that. If we think of the experience of our relations with Argentina prior to the war in 1982, we can understand why the Argentines felt that Britain was going to move on the subject. We had the 1968 Anglo-Argentine memorandum, which expressly talked about sovereignty being on the agenda. We then had the persistent proposals throughout the 1970s for the leaseback arrangement, and then the withdrawal of HMS “Endurance”. Argentina is a country I know well, and indeed I have had the privilege of visiting the Falkland Islands as well. To this day, I am often told by Argentine politicians that Margaret Thatcher led them on to the punch—that Britain deliberately looked as though it was preparing to withdraw from the islands in order to provoke this conflict. I think that is nonsense. None the less, you can understand why they think that there are sympathetic elements here.

Similarly, if we look at relations between Britain and Madrid in the run-up to the Córdoba agreement over Gibraltar, the 1990s were a time of constant proposals from this side for some kind of joint sovereignty. It was only a referendum of the Gibraltarian people that put a stop to that process. By the way, it was a referendum that official Britain detested and for a long time did not reconcile itself to and ignored, until it became politically impossible and a new dispensation was reached. So, yes, this will be looked at in Buenos Aires and Madrid.

It will be looked at, I am sure, by those in Nicosia. They will think that there is an extremely close parallel there, in the sense that this is a military installation rather than an ethnically separate population. Again, they will say “This was ruled from somewhere else and we have a claim”. When I was a Member of the European Parliament, I would often get petitions and resolutions from Greek Cypriot MEPs raising the issue of the base.

What all these claims have in common is that final resolutions are never treated as final by the other party, any more than the final and binding resolution was with Mauritius in 1965. I do not want to bore noble Lords on this, but I feel it bears repetition. Mauritius trousered a large sum of money in exchange for perpetually renouncing any claim over the Chagos Islands.

In fact, there are very few British Overseas Territories that have not at some point been ruled from somewhere else. In addition to the ones I have mentioned, I was listing just now which ones have at some point had some other seat of government. Cayman, Bermuda, the British Virgin Islands, the Turks and Caicos, St Helena and Montserrat were all, at some point or another, ruled by someone else. All of them will be looking at this as a precedent and a claim.

What all our overseas territories have in common is that they are all content with their present status. The British Empire was unusual in the peaceful and voluntary nature of the way it was relinquished: not completely, not universally—there were tragic exceptions in Cyprus, India and Kenya—but they were the exceptions. They were not the rule. Decolonisation in Malaysia was a perfectly peaceful process, for example. The only argument was about whether the British should stay longer to defeat the Communist insurgents. It was a generally peaceful process in the Caribbean and in most of Africa, so the places that have stayed are the places that wanted to stay, and they made that very clear, in the cases of the Falkland Islands and Gibraltar in quite recent memory, with overwhelming referendums. It seems to me that they will now be looking to those referendums as their one shield: the only thing that potentially distinguishes them. But of course they will be vulnerable to the argument that, if we are treating Mauritius rather than the Chagos Islands as the unit, why should we not treat all of Cyprus as the unit, since that was once partitioned in a similar way at the time of independence? They will all be extremely alarmed by that precedent.

It seems to me there is only one way of reassuring these countries, which is to allow a referendum of the Chagossians, dispersed and scattered as they may be. Then, if the Chagossians vote in favour, it does not matter. We would not be setting any precedent. We would be following the principle of self-determination. If the Chagossians vote to be Mauritian, that is of no concern to Gibraltarians or Falkland Islanders or anyone else, because the principle of self-determination would be upheld. But at least let us give them the vote.

We are privileged in this country to be custodians, stewards, of a largely maritime sovereign area. If we put together the oceans around our overseas territories, they are about the same size as India. We are in charge of some of the richest and most important marine environments, and that is our real string of pearls. The pearls are there because in every case they want to be on the string. Let us not set the precedent of tearing one of those pearls off and hurling it away in defiance of the wishes of the people most involved. I beg to move.

[Lord Jay of Ewelme (CB)]

My Lords, in his remarks, the noble Lord, Lord Hannan, has tried to pre-empt the comments that I was about to make. I remember well the Falklands War in 1982. I remember many negotiations with Spain about Gibraltar. I remember the struggles with China over Hong Kong. I remember discussions about the future of the Cayman Islands and the British Virgin Islands—both of which I have visited—as well as discussions about the future of St Helena, Ascension, Tristan da Cunha, Anguilla and the sovereign territories in Cyprus. In each case, the discussions took place on the basis of the interests of each sovereign territory concerned and I believe that that will remain the case. I cannot see why this treaty over the British Indian Ocean islands and the Chagos Islands will affect the discussions that we will have with our other overseas territories about their futures. I think that the situation will remain as it has been in the past, so I do not feel that I can support this amendment from the noble Lord, Lord Hannan.

[Lord Bellingham (Con)]

My Lords, I certainly do support the amendment moved by the noble Lord, Lord Hannan. I will be very brief. The amendment on which I want to focus is not one regarding referenda and consulting the Chagossian people, even though that is very important. Amendment 20L simply states—and I would be surprised if the Government could not accept this—that the Secretary of State needs to come up with a report

“assessing the potential implications for other British Overseas Territories that would arise from this Act and the Treaty”.

What is wrong with that amendment? Nothing. It would cost the Foreign Office a certain amount of time and effort to put together a report but, in the context of what has been said—at Second Reading, in the debate that we had on the treaty, on the first and second day in Committee—it is not asking a lot.

The noble Lord, Lord Jay, was looking specifically at the interests of the citizens in those different territories. He has a huge amount of knowledge, wisdom and experience, and what he said made a huge amount of sense. What he perhaps did not address is the signals that this Bill, if it becomes an Act, and the treaty, will send to other countries. The noble Lord, Lord Hannan, made some specific points about Argentina—where we know that the dispute will not go anywhere; it will go on and on—as well as Gibraltar. I will also mention one other territory that could well—