There are no laws around eg who can use which toilets it's all social convention.
The trans rights activists are removing the social conventions by say sex is not a thing, gender is all, assume anyone you see in a single sex space should be there, and if things go wrong then existing laws can be invoked (ie after the event and we all know how that sex crimes are not really tackled at all for a variety of reasons from not reporting through to police disinterest etc).
Before there was no law saying men couldn't use the toilets changing rooms with a skirty woman on but everyone knew that this indicated biological sex. If someone who seemed a bit chaplike but dressed "as a woman" was in there then generally everyone pretended not to notice but of course if they were a bit weird ie not illegal but creepy then women had the right to go and tell someone / say something etc. This has been eroded - we are NOT "allowed" to challenge anyone or report anyone UNLESS they do something illegal by which point it is too late + loads of creepy men operate just the right side of the law. It is not illegal to stare at people, strike up conversations while standing to near, say weirdy things to them, start talking to schoolgirls and asking them personal questions and all the stuff that we get that is not illegal BUT when the social boundaries are removed, areas where women gather to do personal stuff / take clothes off will be stuffed with men doing this. And there will be NOTHING that we can do about it.
Self ID removes gatekeeping to legal transition which is separate - and transexuals are NOT keen on it at all as it opens up what was a small protected category of dysphoric people into just anybody who feels like filling a form in and BINGO you're a woman.
There will be men who do this for a laugh like that man who got breast implants for a year for a bet. MRAs might do it and then rock up to women's stuff and disrupt it. There's a host of fun stuff.
The govt and some trans activist orgs say that as the equality act is not changing it makes no difference.
It does though because:
Actually loads of orgs and especially ones that are to do with children have been "advised" on changing all their policies and safeguarding on the basis that the EA would be changed or even HAS been changed. It is interesting and worrying that the orgs that have received "advice" from pressure groups seem to be alomst exclusively women only and / or >> extra worry >> things for children. Why the focus on safeguarding and women and children? Where are the challeneges to Eton, the male succession for peers (cannot be claimed by a transman), priests in teh RC church and etc and so on. I have heard of NO challenges to these orgs or others. This should ring MASSIVE ALARM BELLS.
Self ID is already in practice happening and approved > with NO assessment of the impact on girls & women at all. Scottish FOI about the impact assessment on putting transwomen in women's prisons had ticked "age" and "gender ID" on the equalities forms but NOT (unbelievably) the SEX box ie they totally overlooked / disregarded considering the imapct on female prisoners of having transwomen in with them and note this is on a self ID basis as well I believe.
Crime is already being recorded on a self ID basis.
We know about schools / guides / swim england.
At this point the horse has bolted and I am not sure what happens next ALTHOUGH the revelation that loads of leading trans activists who have informed the govt and schools etc are pervy weirdos has had an impact as has the women all gettign assaulted by the penis person convicted of rape who was shut in with them. This stuff is so OBVIOUSLY against all common sense and the tone in the papers is definitely changing.
What is worrying is that all the political parties are all "TWAW #nodebate" and of course they are in charge so that is a major issue.
Misogynists are loving all this. And men who enjoy committing sex offences are watching with extreme interest.