As the law stands at the moment you have to 'live as a woman' for two years and then obtain a gender reassignment certificate. But we are already finding schools, institutions, doctors, universities, feminist groups, lesbians, sports, scholarships, etc being given guidelines where many men without even those two criteria, are accessing things previously reserved for women and redefining language to accommodate a tiny minority.
The girl guides let a boy in, he did not have those two criteria. There are loads of similar examples on these threads alone. Pubs, clubs, restaurants, have no recourse if a man identifying as a woman wants to enter. The two current criteria are already being completely ignored. It is discriminatory to ask to even see a gender reassignment certificate.
Culturally in most places it's already a done deal.
It will get 100 times worse if a self identification goes through. Yes there might be a court case banning a transwoman from accessing a rape crisis centre, but the damage will already have been done. The culture is shifting towards it becoming completely acceptable, not only without asking or consulting women, but without even telling them!
A national treasure like Jenni Murray has received the most heinous abuse for even suggesting that a transwoman is not the same as a woman.
How many distressed and uncomfortable women and children is it going to take?
This entire process has to be reversed. It's already gone too far.