You'll be shocked to know how many lab tests were carried out on animals in the UK last year

Around 123,000 of the experimental procedures were categorised as "severe" in terms of suffering.

Laboratory animals were used in more than four million procedures in the UK last year, according to new figures described as "shocking" by anti-vivisection campaigners.

The annual animal testing report from Britain's Home Office also revealed a 19% increase in experiments involving Old World monkeys since 2013, partly due to the development of "smart" drugs.