Unanimous decision handed down today: You’re not an X. You’re either male or female.
Reasoning was “There is no legislation in the United Kingdom which recognises a non-gendered category of individuals. On the contrary, legislation across the statute book assumes that all individuals can be categorised as belonging to one of two sexes or genders, terms which have been used interchangeably.”
It remains to be seen if other countries will agree that you’re either male or female.