Jack has no GRC, and it has been long acknowledged (even by the gender addled Scottish government) that no GRC = transwomen are men and transmen are women.
In the longer article Jack says he doesn’t use the men’s when “presenting femme”:
“Not out of genuine fear of violence, but more as an escape from the smirks and side-eye I’d experienced in men’s toilets in the past. If I was going to make people uncomfortable in either room, the lesser disruption had seemed to be to go with female friends whose presence could reassure other women of my non-rapist credentials.”
Budge up, women, there’s an entitled man who wants to avoid <checks notes> side eye in the men’s and he doesn’t care if it makes you uncomfortable.
For the Guardian to post such a heavily edited version of this tale (which may or may not have happened) is exactly why so many women no longer read it.