Can we stop prepetuating the myth.
TW with a GRC are only allowed into a women's only space if the organisers of that space have decided they think that's okay.
The problem is that not enough women can be bothered, or even want to impose the proportionate clause that allows biological women spaces only.
So no, "legal women" (TW with a GRC) are not allowed every where.
The problem is too many people including women think they should.
ie the problem isn't the law, but so many women have sided with the Stonewall position.
This is why I said up thread, even though many men would not think twice about setting up a club just for biological males, most women would think, oh dear, we must be kind and include TW.
The mechanisms are there for biological women only spaces.
Unfortunately not enough women want to use them.
Even though if it was a private club there would be no legal challenge to them doing this.