The Medicines and Medical Devices Bill 2019-21 (Bill 136) was introduced in the Commons on 13 February 2020 and had its Second Reading on 2 March 2020. The Committee Stage ran from 8-10 June 2020 and remaining Commons stages took place on 23 June 2020. The Bill received its Second Reading in the Lords on 2 September 2020.

In 2019, there were 3.4 million procedures completed involving regulated living animals, which was the lowest annual number since 2007. This note summarises and analyses trends in data, including the growth of universities as the dominant seat of research on animals, the use of different species, and the decline of research for toxicological purposes.