The government wants to decide how to reform this, but I worry that a lot of transphobes (TERFs specifically) are filling this out. Even if like me, you're cis, fill it in to negate their hatred.
https://consult.education.gov.uk/government-equalities-office/reform-of-the-gender-recognition-act/
I found this a quick read/parts of it helpful/insightful beforehand:
Also, you don't have to fill it in all at once! (I haven't) You can return to it later (but before the 19th)




