Diego Garcia Military Base and British Indian Ocean Territory Bill

Debate between John Whittingdale and Alex Ballinger

2nd reading
Tuesday 9th September 2025 Commons Chamber

[Sir John Whittingdale]

I cannot answer the hon. Gentleman specifically on that issue, but I can tell him that it has been absolutely clear that whatever the UNCLOS opinion is, it is not binding on this country. We will read with interest its view, but it is not one that we are necessarily required to follow.

The existing position has safeguarded the interests of this country for a very long period, so the first question one is required to ask is: why are we changing a guaranteed security status for this country by handing over the sovereignty of Diego Garcia? As my right hon. and learned Friend the Member for Kenilworth and Southam has said, it is based on opinions that have been expressed but not ones that we are required to follow.

As the hon. Member for Crawley (Peter Lamb) said, I understand that the original linkage of the Chagos islands to Mauritius that took place was regarded as a matter of administrative convenience. However, they are actually 1,250 miles apart. On that basis, when the United Kingdom agreed to the independence of Mauritius, it was separated from the Chagos islands. There was no suggestion at that time that the two should be linked and that the islands be given over to Mauritius, which, despite the linkage, had no claim and no involvement in their running.

[Alex Ballinger]

Does the right hon. Gentleman, who is my colleague on the Foreign Affairs Committee, acknowledge that by opening negotiations with Mauritius, the last Government conceded that there was a point around sovereignty to be discussed and that, certainly from then onwards, it was difficult for this Government to roll back that point?

[Sir John Whittingdale]

It had already been rolled back. The hon. Gentleman is right that the last Government began discussions because Mauritius expressed a view. However, that was on the basis that a mutually beneficial arrangement could be reached. It was concluded that such an agreement could not be reached, and on that basis the last Government ceased the negotiations. It is not a question of their being rolled back; it was this Government who chose to reopen negotiations that had been closed down by the previous Government.

I come back to the international judgments. The other one cited by Ministers on the Government Front Bench early on in the discussion, when this issue was first raised, was the risk to access to electromagnetic spectrum as a result of the ITU potentially reaching a judgment that might be based on the non-binding judgment expressed by the ICJ. There is no actual evidence that it was going to do that, but it was possible that it might, and for that reason the Government expressed the view that this was important.

I would point out that the ITU has no ability to determine the use of spectrum. The Minister, in answering a written parliamentary question in February this year, made it clear that the allocation of spectrum was a matter for sovereign states. The ITU is a sort of gentleman’s club where everyone gets together to discuss these matters, but it is not able to hand over the right to the use of spectrum from one country to another. It is also worth noting that the ITU has, over the years, been subject to considerable pressure from China, which had a secretary general of the ITU. I recall from my time dealing with issues around the ITU the real concern about how the Chinese were seeking to use the ITU, so in my view it is a good thing that the ITU does not have the power to allocate spectrum.

There are also serious strategic concerns that the Government have not yet properly addressed. As has already been mentioned, an element of the agreement involves a requirement for us to “expeditiously inform” Mauritius of any armed attack on a third state directly emanating from the base. When the Minister gave evidence to the Committee, I pressed him on whether that would require advance notification—