Written Question·Foreign, Commonwealth and Development Office·UIN 75281

Chagos Islands: Sovereignty

Tabled: 4 September 2025
Answered: 17 September 2025

Question

Priti Patel

ConservativeWitham

To ask the Secretary of State for Foreign, Commonwealth and Development Affairs, if he will publish all the estimates he received on the financial costs of the UK-Mauritius Treaty from the Government Actuary's Department since 5 July 2024.

Answer

Stephen Doughty
The cost of the Diego Garcia military base agreement in today's money is £101 million while the net present value over 99 years is £3.4 billion. These figures have been verified by the Government Actuary's Department and draw on long-established methodolo...

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