Sorry dont have time to read thread, so I may repeat what others have said.
This ruling like the Lady Haldane ruling changes nothing.
This is the situation we have had since the EA (thanks Ayesha_Hazarika) was ammende to accomodate the EA.
ie even though biological women are by far the larger group, the EA says there are only a few occassions when the single sex exemptions can be utilised.
In this new ruling it says:
The decision of the UK Parliament to enact the GRA in the wide terms which it did necessarily, however, drives us away from a strict biological definition unless the context clearly and necessarily dictates otherwise. ...
The exception provisions of the EA (in particular Schedule 3 para 28) apply to enable providers of single-sex services to exclude trans individuals, including those with a GRC who would otherwise be entitled to be included. ...
So the only options are to repeal the GRA (too many powerful people have their "creditibility" invested in this not happening) or (which would make a GRC pointless) change the EA to say that sex means biological sex.
Not sure that the cost of 2 courts cases was worth us being told nothing has changed.