Every teacher should have read or had training on KCSIE. The bit on emotional abuse includes this:
"It may involve conveying to a child that they are worthless or unloved, inadequate, or valued only insofar as they meet the needs of another person. It may include not giving the child opportunities to express their views, deliberately silencing them or ‘making fun’ of what they say or how they communicate. It may feature age or developmentally inappropriate expectations being imposed on children. "
I think expecting most children, but particularly SEND and non-native English speaking children to use third person pronouns as individualistic things rather than class based (which is the norm) is developmentally inappropriate and difficult. I think deliberately silencing GC children and their use of sex based pronouns (i.e. normal English usage) fits this description too. Their needs are also not being considered if only a few get individual pronouns - they're being valued only insofar as they meet the needs of others more fortunate/ special. To be fair every single child should get to choose their pronouns. Good luck teaching in that environment.
Protected characteristics must be balanced. The entire school isn't adjusted to the needs of one or two or 5 or 10 children with other protected characteristics. Disability, religion and sex are also protected characteristics all of which will be affected by wrong sex pronouns in different ways. Where's the balance?
For children transed by school - particularly without parents knowledge - who go on to puberty blockers and cross sex hormones and surgery, and then discover it's not the solution and regret their bodily changes, what's the excuse going to be from the teachers? Because using 'preferred' pronouns is just so clearly biased and coming down on one side of the debate it's beyond belief. And there is a middle ground, which is just to avoid third person pronouns altogether for any gender questioning students.