@Datun
If you want changes in law that discussion needs to take place.
Just pointing out we don't need to change the law. We need to uphold it. And we need service providers, everywhere, do not be afraid to uphold it any longer.
{Quote ends - let's see if I've managed not to screw it up this time}
...& this is exactly why I think Blue's contributions are an interesting insight into the future, as much as a derailment.
Now, if I go to, say, the gym, & say 'I don't mind at all if you have a unisex changing area, but to exercise here, I do need there to also be female only changing rooms. Female as in sex'. then I am expressing a view about the binary & immutable nature of biological sex that is now deemed worthy of respect.
So the gym owner, realising that actually that's exactly what lots of their female clientele want, can sort that out, with unisex private rooms for those who aren't eligible to use one type of single sex space, or comfortable in the other, as a 'reasonable adjustment'.
& if there are subsequent complaints of transphobia, the business owner can politely convey that they are making legal & reasonable provision for the legal & reasonable requirements of all their clients, in line with their right to run a safe, viable & profitable business.
I'm sure there'll be considerable further hoo-ha, including court cases, but the Overton window just shifted, quite a considerable distance.