Animal Experiments: Rodents

The number of mice born outside the UK and used for the first time in experimental procedures in 2024 was 21,287. While this is an increase of 4.6 per cent from 2023, the overall total number of procedures involving mice fell by 2.3 per cent from 2023 to 2024.

The Home Office regulates under the Animals (Scientific Procedures) Act 1986 (ASPA) to assure compliance with the robust protections afforded to animals used in science and to administrate the licensing framework. Licences to test on animals are only granted where applicants comply with the principles of replacement, reduction and refinement. Animals can only be used where there is no non-animal alternative, numbers are minimised, and where the most refined methods of testing are used to minimise harms.

The Government has published the strategy, "Replacing animals in science, A strategy to support the development, validation and uptake of alternative methods" which will accelerate the roll out of safe and effective alternatives to phase out animal testing in all but exceptional circumstances. Available here: https://www.gov.uk/government/publications/replacing-animals-in-science-strategy/replacing-animals-in-science-a-strategy-to-support-the-development-validation-and-uptake-of-alternative-methods