When the UK’s Gender Recognition Act 2004 passed, Westminster put in place firm guidelines (not particularly onerous and didn’t require lopping off any bodyparts, but did require a diagnosis of GD) by which one could qualify for a GR certificate and thereby change sex on official documents.

Surprise, surprise, very few GRCs have ever been given out. And it is t because they’re being turned down, they don’t even bother to apply for one.