@BettyFilous
Are FPFW actually supporting the recording of legal sex (eg GRC) in the ‘sex’ category as the article suggests? If so, that’s still a problem IMO. It should be split into sex at birth, legal sex and gender identity if they’re going to be finicky. Legal sex has no place in the Sex category if we are using data to plan health services. It’s pointless.
I think they're being pragmatic about what's achievable in a few weeks.
Yes, 5000 GRC holders answering the sex question inaccurately isn't ideal, but it's better than the estimated 200,000 - 500,000 people who fall somewhere under the trans 'umbrella' doing it, with the full sanction of the ONS. As per the guidance they've just released, all you need is a passport (updatable on a self-ID basis) or an unspecified other (self) ID document. That's the bit FP are challenging. ONS have conflated legal sex with 'sex on an official document that lets you put whatever you want'.
Of course, plenty of people are just going to answer it on a feeeelings basis no matter what the guidance says, but that would be both dishonest and illegal, and the guidance should reflect that.
For this census it should be birth certificate, IMO - and for the next one, it should be unambiguously biological sex, with an optional spot to record your beliefs about gender if you want to.