IT WAS A landmark decision. On April 16th Britain’s Supreme Court ruled that, for the purposes of the Equality Act of 2010, the country’s main anti-discrimination law, “man” refers to a biological man and “woman” to a biological woman. The judgment ended years of legal uncertainty about such matters. Since sex is a protected characteristic under the act, it means a space or service that excludes men, such as a women’s bathroom, can also exclude all transgender women (biological males). The next day, the British Transport Police announced it would now conduct strip searches on the basis of biological sex, rather than how a person identifies.