The writer of this piece seems a bit confused by the incredibly complicated ruling, so I'll try to help her a bit ...
Which toilets trans people can use
The one for their sex or a gender-neutral one
... what this means for your local women’s running club or gym
It is for women
... how employers can handle sensitive situations at work without outing or humiliating trans staff
No-one needs to be outing or humiliating trans people
The EHRC issued interim guidance saying that trans people should stop using the toilets, changing rooms or NHS wards of their preferred gender ... and only play on the grassroots sports teams of their birth sex. But is that really what the court intended?
Yes
The former supreme court judge Jonathan Sumption has already warned of the risks of overinterpreting the ruling, arguing that he took it to confirm that single-sex services are entitled to exclude trans people, but not obliged to if they don’t want to.
Lord Sumption immediately went on air and misinterpreted the ruling.
Suppose you wanted to start a women’s walking group, the Labour MP Rachel Taylor asked her, but you actively wanted to include trans women. Is that allowed? No, was the eventual answer: of course you can let your trans friend join, but then you’d be a mixed not single-sex group, and would have to also accept any man asking to join
Correct, and fair enough.
What the biological women in this group actually want – where they’d draw their own boundaries, or what feels right to them – is irrelevant on this reading
What biological women want would certainly be irrelevant if the ruling had gone the other way as they would have no rights ever to single-sex spaces or services.
Asked how this imaginary walking group should check that every new member was definitely biologically female, Falkner suggested they might make a judgment on sight, but that nobody was going to be walking around with badges on policing it.
Correct - that is how single-sex facilities have always worked.
Yet where people do and don’t feel welcome in society is determined by social norms as well as rights, and the former have swung from one extreme to the other in recent years; you don’t have to disagree with the supreme court’s ruling to see how that could be wildly disorienting.
Very true - Stonewall and others should never have gone around misinterpreting the law.
A law that doesn’t work in real-life scenarios is a law that doesn’t work, full stop.
Also very true - and it certainly wouldn't work in real-life scenarios to have a law that says "Women's spaces can exclude most males but must include males with a GRC but no-one can ask to see the GRC". Which is likely one of the reasons why the Supreme Court did not rule this way (they did say previously that any law has to be "workable in practice").