"Many seem to want a slight 5ft 4 person who's been living for decades with a modified physiology as woman..."
No surgery can make a man a woman.
"...with a long term male partner to be excluded from the ladies loos. It's a completely unreasonable ask."
It's a completely reasonable and legal position to take. By that criteria all short gay males who are in long term relationships should be welcome in the women's toilets (and other spaces, because we know it doesn't end at toilets).
"What you ask would require:
- DNA testing of every women's toilet user, with security to prevent entry to those with a Y chromosome..."
No, what it would require is for males to be honest with themselves and the rest of the world about their sex, and an inclination not to break the law, or cause distress in women.
"...or
- every person with a Y chromosome to voluntary give up using women's facilities no longer how long they have been doing so..."
Yep. This please. Thank you very much. That was easy wasn't it?!
"... and no matter how unlikely they are to cause fear in any woman."
Even one woman distressed or fearful is more than enough don't you think? And it's not just about fear, it's about privacy, dignity, actual safety. And it's the law!
"It just isn't possible, and fighting to try to make the impossible happen just makes the cause seem a bit ridiculous at times."
Wrong again! It is possible, women are managing to claw back their hard come by rights which had been stolen via stealth through the courts and public opinion is starting to catch up on the utter insanity that's been bubbling away under the surface like a boil for over 20 years now.
Males continued attempts to crowbar their way into women's spaces, shortlists, prizes, refuges, prisons, schools, sports etc, ad nauseum, and the women who support them is what is truly ridiculous.
It's not impossible at all in fact. We managed single sex spaces and words that had actual meanings everyone understood to mean specific things not too long ago, we can and will get back to that eventually.