Mark Lehain, a headteacher until 2017 and now director of the Campaign for Common Sense, said heads were “trying to mediate between what a student wants or their family wants, where the law is and where guidance is”.
“It is not always clear what the right thing to do is,” he said.
Seems quite clear to me. For example:
A girl who formally transitions to boy must be allowed to stay at the girls school, or this would be "direct gender reassignment discrimination"
Likewise, a boy who formally transitions to girl must be allowed to stay at the boys school, and the other boys taught to treat that student's choices with the same respect they would wish for themselves. Ie no mocking or bullying.
The only difficulty would be regarding coerced speech.