Thanks for the comments. I'm pleased that people are reading my piece and finding it helpful. I am writing as a teacher from a teacher's perspective so it doesn't cover everything. However, I hope I made the distinction between sex and gender clearly, and developed the crucial dilemma between affirmation and safeguarding. That - incidently - was inspired by Claire Graham and her superb talk that she gave last year. I have learned so much from Claire and I value her wisdom.
Thanks for noticing the digs that I get from some of my fellow trans people, @NeurotrashWarrior Sadly, I'm used to it. I sense so much fear behind their comments. But when they have not been used to challenge (or engaging with the challenge), my arguments may seem threatening to them.
But that is an aside. I wrote the piece because I am worried about the direction of policy. Unquestioning affirmation is - in my view - a disaster not only for girls but also trans-identified children.