To ask the Secretary of State for Foreign, Commonwealth and Development Affairs, with reference to paragraph 3(b) of Annex 1 of the document entitled UK/Mauritius: Agreement concerning the Chagos Archipelago including Diego Garcia (CS Mauritius No.1/2025), what equipment located in the Chagos archipelago beyond Diego Garcia requires notification to the Government of Mauritius before (a) maintenance and (b) upgrades are conducted; and what procedures will govern the (i) content and (ii) timing of such notifications.

There are a range of vital facilities and capabilities on the base on Diego Garcia and the surrounding area that keep Britain safe. We do not discuss these publicly for security reasons.