If you get a message from school that the fire brigade are coming to do a talk you assume it's to do with not playing with matches or electrics, not preferred pronouns. It feels insidious. Especially, as a PP said, if she was in any kind of uniform.
Transgender trend are working hard to provide some balance to the TRA juggernaut in schools.
If you haven't looked at Transgender Trend's Twitter lately, I'd recommend it. They've got a campaign #enoughisenough to challenge the current trend of - apparently anybody now - going into schools to tell children if they don't like football & fighting they might be a girl.