No, because the word transwomen doesn't mean transsexual.
Yes, a small number of transsexual people have been using women's facilities for years. Most of them were totally obvious because most MTF don't pass. Also they were much smaller in number.
But, the word 'transgender' means something different - it is an umbrella term, covering a many more groups and much larger in number. 'Transgender' includes the people we used to call transsexuals plus transvestites, cross dressers, non-binary people, gender fluid people, people experimenting with gender, and fetishists. (Remember, Stonewall says "expectance without exception"".
Many of these people call themselves transwomen, and/or think they should be in women's spaces.
What's changed, massively, also, is how politicised this issue is now. 10 years ago, if you said that women's wards or prisons should be single sex, no one would have batted an eyelid. But now, when women meet to discuss this topic, angry groups (including a majority of males, in my experience) gather to protest and intimidate women. (see #WPUKmanchester on Twitter for an example of this from just this week).
That's changed. And with it, the number of males who demand that they are entitled to women's spaces. That's very different from before.