You keep banging on about all over the world and especially the USA where TW accessing female toilets happens - how much have you traveled and lived in other countries? I have traveled extensively and lived and worked in several countries and I can categorically tell you that it is NOT accepted practice.
28 states tried to introduce bathroom bills in the USA. All failed. Trans women using women's toilets is accepted practice in the States. As it is in Western Europe. But I agree, and have tried to say comparable countries. There are many countries where trans rights have a long way to go, They are usually countries where the same applies to women's rights.
Finally do please answer this question jj how can someone tell the difference between a man and a TW? You've been asked several times now.
I have answered this. The same way people do now and have done for decades. Or as the law says, if someone is perceived to have undergone, be undergoing or intends to undergo gender reassignment then they meet the threshold for protection under the EA.