In April 1992, OutRage! members dropped their trousers in their "Bend Over For Your Member" demonstration outside Parliament. They were protesting over the age of consent as, in 1992, UK laws treated consensual sex between gay men under 21 as a criminal offence. The age was then lowered to 18 in 1994 before finally being lowered to 16 as part of the Sexual Offences Act of 2000.
Courtesy of the Gordon Rainsford Archive, Bishopsgate Institute