Question to the Ministry of Defence:

To ask the Secretary of State for Defence, what the cost to the public purse was of spending on (a) chemical, (b) biological and (c) radiological defence in each financial year since 2019-20.

A number of areas within Defence, including DE&S, the Front Line Commands and the Defence Science and Technology Laboratory (Dstl) conduct work or incur costs in these areas and financial information is not held centrally. Accordingly a departmental response can only be provided at disproportionate cost.