'The guidance warns that making jokes about a child who is not transgender but resembles or dresses like the opposite sex, could also trigger legal action. “A female pupil has short hair and wears stereotypically male clothing,” it suggests. “A supply teacher mistakenly assumes she is trans and jokes about this with another teacher outside the classroom. Some students hear this, causing embarrassment to the pupil in front of some of her classmates. This could amount to unlawful perception discrimination because of gender reassignment.”
Surely making fun of a pupil is always a bad thing. I'm not sure how this is a clear example that should be included in guidance about gender etc.
My dd used to be called a name that mocked her so-called gender presentation. Eg if her name was Annette she would have been called 'manette'.
But this was by people who identified as Trans. So nothing was done. I would prefer guidance that would help in those circumstances.