Question to the HM Treasury:

To ask the Chancellor of the Exchequer, with reference to the Agreement between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the Republic of Mauritius concerning the Chagos Archipelago including Diego Garcia of 22 May 2025, CP 1334, what the estimated level of the GDP deflator is over each of the years 14 to 99 of the agreement.

The Government has applied the Office for Budget Responsibility’s (OBR) most recent long-term forecast of economic determinants, in accordance with Green Book guidance on economic appraisal. For years 14 to 99 of the agreement, the GDP deflator has been estimated at 2.30%.