I find it utterly utterly bizarre and frankly scary that in Brighton schools and council there are so many cheerleaders for forcing unconsenting teenage girls to share changing rooms and toilets with people with penises (using their type of terminology).
It's like a dystopian nightmare. I feel like I'm going to wake up any second, goodness knows how the OP must feel with the year he's experienced of obfuscation, evasion, word salad and downright lies.
What's the point of safeguarding law and KCSIE if this is something adults in schools can do? Really - what is the point? It's all meaningless paper if this can happen. They're committing emotional abuse of the girls by coercion and gaslighting on top of the actual risks they're exposing them to and the breaking of several laws.
What next, offering up girls bodies as comfort blankets for sad boys? Oh wait.... this is actually already quite close to that....
And to be clear, no girl can consent to this. It's against the law, they are underage and any parent who consents is abusive because the risk of sexual assault is far far higher in mixed sex spaces and that's before you get to dignity, privacy etc.
Well done OP for standing up for your daughter's human rights.