How did we get to the Supreme Court ruling re women’s rights?

[Oopsisaidit]

Can anyone briefly Explain what led Scotland to women’s rights court case? I vaguely think that the SNP started it and the GRC was important, but if anyone can point me to a brief history, that would be great, thank you!
I am googling, but getting a bit tired of chest beating and confusingness
thank you!

If anyone has a credible idea as to why British Green parties have become so wedded to the trans cause I'd love to hear it. They are doing nothing useful for the environment at all now.