Question to the Ministry of Defence:

To ask the Secretary of State for Defence, with reference to the Prime Minister's Oral Statement of 25 February 2025 on Defence and Security, Official Report, what the total cost to the public purse will be of the UK defence budget in financial year (a) 2025-26, (b) 2026-27, (c) 2027-28 and (d) 2028-29.

This commitment will be funded by reductions in Overseas Development Aid to 0.3% of GNI and does not require the Government to change the spending envelope.

HMT is currently undertaking the second phase of the Spending Review. This will set Departmental budgets for three years from 2026-27 for RDEL and four years for CDEL, on 11 June 2025.

The Defence Budget for financial year 2025-26 is £59.8 billion and was published in the Autumn Budget in October 2024.