Question to the Home Office:

To ask the Secretary of State for the Home Department, with reference to the answer on 15 December 2025 to Question 97967, what figures her Department holds on the number of dogs and non-human primates used in dedicated pharmacokinetic studies for human medicines; and what the evidential basis is for the target to reduce such use by at least 35% by 2030.

The Home Office does not publish a separate aggregated category for the number of dogs and non-human primates used specifically in dedicated pharmacokinetic studies for human medicines for publication purposes conducted under the Animals (Scientific Procedures) Act 1986. While information relevant to such studies may be held within individual project licence records for regulatory purposes, there is no distinct reporting category for them in the published in the annual statistics.

The target to reduce the use of dogs and non-human primates in dedicated pharmacokinetic studies for human medicines by at least 35% by 2030 forms part of the Government broader programme Replacing animals in science: A strategy to support the development, validation and uptake of alternative methods. This number was agreed following discussions between regulators, research funders and officials on what was considered to be challenging while also likely being scientifically achievable.