Thank you @ScrollingLeaves , it is very kind of you to say that.
When I first raised this with the school, in early December, I felt a sort of panic, over how I was going to find the evidence I felt I needed.
I'd been lurking on FWR, for a few years, occasionally posting, and reading all I could.
I'd been gradually noticing a turn in attitudes, since about 2018, in the school I work in. Acceptance or be cancelled. More and more children were coming up to me with no idea about their biology or how the two sexes differ, or even how humans can't change sex.
Since the pandemic, I have children every year, who know about the surgery some trans people undergo, and many children believe that humans can change sex.
I've cried to my best friend, that having taken a strictly scientific line with the children, I am going to be reported to my school and suspended, for being transphobic. I don't deny that trans people exist, or that they don't matter, but I do clearly explain the science behind the two sexes, and why that is immutable.
Post pandemic, I have been more and more outspoken at work, with my colleagues. It also helps that the current Headteacher in my school is a biologist. Gradually, common sense is starting to prevail.
To then see my DD's school, completely dismissing my concerns, on things that they are not even legally compelled to teach, absolutely boiled my piss infuriated me!
And I know, that there will be other parents in this situation, so I do, really hope, that if any of the resources, links and arguments given here are useful, other parents use them.
Also, as an offer, if there are any parents who find that their children's school is using No Outsiders resources, I will willingly stand as a names example of where the school has removed the posters, due to parental complaints.