Question to the HM Treasury:

To ask the Chancellor of the Exchequer, pursuant to the Answer of 8 September 2025 to Question 71207 on National Security: Finance, if she will place publish a copy of the (a) Government’s and (b) NATO guidance on the definition of (i) defence and (bii) security related expenditure, for the purposes of the UK Government meeting its NATO commitments.

The NATO definition of defence expenditure, and defence and security related expenditure can be found on the NATO website:

NATO - Topic: Defence expenditures and NATO’s 5% commitment

These definitions are used by the UK and all NATO allies when reporting their NATO qualifying expenditure.