It seems that personal identification is enough, Lizzie. 
Here we have the 'out of control SNP' sending a big f*uck you to biological women. It seems the judge wants answers as to why they have ignored the rights of women. If a man can be a woman then there is no such thing as a woman.
Scroll down the tweets.
https://twitter.com/heraldscotland/status/1456741260354625538
I do not understand Opti what apparently has/is happening in Scotland, but the Gender Recognition Act 2004, plus amendments which still covers the whole of the UK, still defines that men cannot be treated with the same rights as us women until they have obtained a Gender Recognition Certificate only issued by the Government Gender Recognition Panel.
There has been no change legally to that process although some groups, I think very wrongly, are trying to promote the "self identification" angle and circumvent the GRA 2004. It cannot and should not happen, especially at this time of us females living in heightened fear about our safety. Any change has and will be vigorously challenged by feminist groups who have got my full support.
I do not wanty to share a female space with a full, physical man who is just claiming to be female!!

I would add that all the genuine Trans women I have had dealings with agree with the existing system, without any shortcuts.