Just to pick up ye olde ‘TW have been using womens toilets for decades’ chestnut
Men wishing to transition were told by their doctors that as part of that process and to prove they were serious they should use present as female & womens toilets
Once they had got comfortable doing this they could go back to the doctor who could tick off that their patient was indeed serious about transitioning
At no point did anyone think to ask women if they were ok. Our consent, even in fact our support, was taken for granted because women obviously just exist to make men feel better. NO ONE ASKED US!
Plus of course it goes without saying in 2004 when GRC was brought in, the government estimated it would be about 5000 ppl. They did not anticipate that 18 years later any bloke could state he was a woman and that just had to be accepted because beeee kind/women is a feeling