@AskingQuestionsAllTheTime
Sex is a protected characteristic, and single sex spaces, including hospital wards, rape crisis centres, changing rooms and public lavatories, are mandated as single sex. Not single gender: in law, gender is not actually defined as far as I know, and it is hard to see how it could be since it deals entirely with what an individual feels rather than with objective fact.
I just wanted to pick up on a couple of points of legal detail here (not to get into a general argument on the implications, as I’m pretty much resigned to the fact that i will never see eye to eye with the majority of people on this board).
As far as I’m aware, neither sex not gender are defined anywhere in law - in fact, the way the terms are used in legislation suggests a degree of confusion about what the difference between them is (the Gender Recognition Act says: “Where a full gender recognition certificate is issued to a person, the person’s gender becomes for all purposes the acquired gender (so that, if the acquired gender is the male gender, the person’s sex becomes that of a man and, if it is the female gender, the person’s sex becomes that of a woman).”
Also, the existence of single sex services is permitted by an exception to the general non-discrimination principle under the Equality Act, rather than being a direct consequence of the fact that sex is a protected characteristic. The starting point is that you cannot discriminate against a person because of their sex, so you could not exclude a man simply because he is a man - however, you can depart from that if it is a proportionate means of pursuing a legitimate aim, and there are various specific provisions expanding on this is the context of single sex spaces etc.