Written Question·Home Office·UIN 96751

Animal Experiments

Tabled: 3 December 2025

Answered: 10 December 2025

Named Day

Question

Ruth Jones

To ask the Secretary of State for the Home Department, what estimate she has made of the number of animals involved in LD50 tests by type of animal; and what assessment she has made of the effectiveness of those tests.

Answer

Dan Jarvis

The Home Office publishes detailed annual statistics on the use of animals in science, including procedures for acute and sub-toxicity testing methods such as LD50 (Lethal Dose 50) and LC50 (Lethal Concentration 50). According to the latest published figu...

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