My local education authority makes a lot of use of the Cornwall guidance, and quotes quite a bit of it. One part that caught my eye was this:
“Unlike most of the protected characteristics, such as sex, race and religion, but like disability, this protection works in one direction only […]”
(Their emphasis)
I think that’s a false equivalence. I can’t think of any disadvantage to a non-disabled person from adaptations made for the benefit of disabled people. But by insisting that it’s one direction only, they’ve ignored (or not even thought about) the effects on non-transgender children; indeed, the sentence continues: “not being transgendered is not a protected characteristic.”
So if a pupil is confused, or even distressed, by the changes of name/pronouns/clothing then their feelings can be ignored because they don’t have a “protected characteristic”. What about the protected characteristic of age? A young child should have the right for their age to be taken into account.