Very refreshing to have 3 out of 4 people discussing this having xx chromosomes and I agree that both MK and JM were civilised and polite.
It was a shame that they did not allow MK to rebut JM's misrepresentation of the judgment. The judge went further than JM suggested and specifically said that Maya's "beliefs" about the immutability of binary sex were incompatible with a democratic society, ie that if she said as much this would create a hostile environment for trans people.
So the scientifically supported fact of of the immutability of sex is rendered unsayable by the judgment, on pain of being sacked.
This is not, as some have suggested, the same as not permitting employees to state views that homosexuality is wrong. Depending on the context I accept an employer might have grounds to dismiss an employee on these grounds. And this would be an opinion, not a fact that is agreed by 95% of scientists.
A better parallel is if an employer prevented employees from discussing climate change (upon which 95%+ of scientists agree) on the grounds that others who do not believe in man made climate change might disagree with them, and might feel hurt and uncomfortable.