Genuine question
*@Wombat2WombatCombat* but do you have problems with reading comprehension?
That link that I provided, the one where you say it doesn't say anything about single sex spaces gives these as examples of things you are allowed to do
Examples
738.
These exceptions would allow:
• a cervical cancer screening service to be provided to women only, as only women need the service;
• a fathers’ support group to be set up by a private nursery as there is insufficient attendance by men at the parents’ group;
• a domestic violence support unit to be set up by a local authority for women only but there is no men-only unit because of insufficient demand;
• separate male and female wards to be provided in a hospital;
• separate male and female changing rooms to be provided in a department store;
• a massage service to be provided to women only by a female massage therapist with her own business operating in her clients’ homes because she would feel uncomfortable massaging men in that environment.
Now granted, it doesn't list every single type of space that exists in reality and tell you if that can or can't be single sex but it is very clear that there is the allowed legal right to have spaces/rooms/facilities that are for just men or just women.
Your next bit about the prohibition of those of a different sex entering a single sex space. If a space is designated for one group of people only then every other group is prohibited, that's what the law is saying. Are you expecting a paragraph to exist within the legislation that says for example.
"You are allowed to make toilets single sex and if you do make them single sex then that means that only that single sex, not the other sex is allowed to use them and you can enforce that."
Because that would be ridiculous. Saying that you are permitted to make a space single sex, is enough, you don't need the rest of the sentence.
To give an example. If I see a 'no smoking' sign on the wall I know that that means I am not allowed to smoke in that space. They don't need a sign next to it that says 'this means you are not allowed to smoke, by smoke we mean cigarettes or cigars, oh and if you do smoke here then you'll get in trouble because you're not allowed to, trouble may come in the form of being asked to leave, or fined, or the police called'. There is no test before entering that space to ensure that you understand you're not allowed to smoke or to test if you have a nicotine habit. You are just told in this space you can't smoke.
When it comes to toilets, the sign denoting it as a womens toilet means it is a space designated for women. Anyone who is not a woman should therefore not be using it because they are not women.
This really isn't hard, or confusing and for you to pretend otherwise is disingenuous.