Think you are getting muddled by some of the posts on here, which whilst pertinent to the wider debate have nothing to do with this particular case.
Upton’s belief that he is a woman is a defence to the accusation of sexual harassment.
So in deciding in the allegations against Upton of sexual harassment the judge does not have to test his belief as WORAIDS.
If i am wrong and even if the judge did determine that his belief is a protected belief then that would still not provide, that he could by virtue of his belief enter a women's changing room.
it is IMHO that those who hold a gender identity belief will never seek to have that belief protected because it is too risky for them.
because if they failed it would be game over in law.