There was a conversation (real and undisputed) between a teacher and two girls, and this was recorded, presumably because the girl was expecting to need back-up as her point of view would be shouted down.
The teacher clearly had half baked ideas about so-called 'gender', claiming that intersex is a gender. The girl referred to someone identifying as a cat, and said that she had a right to say that this person is not actually a cat, but a human, and was told that her views were despicable, she should go to a different school, and would be reported to the head for expressing them.
What is debatable is whether there is an actual child in that particular school who identifies as a cat. The Head (or a spokesperson) says not, which may or may not be to protect a vulnerable child. We don't know one way or the other. But that is not the point. The point is that there is no freedom of speech around so-called 'gender' issues in that school, and the teacher was way out of line in the way she tried to gaslight the girl and bully her into denying the evidence of her eyes.
The element of doubt about a small and irrelevant part of the whole was pounced on by the trans lobby with a Gotcha! (sound familiar?) and used to suggest that this is all 'political correctness gone mad', that people have been 'fooled', that it was all fake and so on. The resulting smokescreen deliberately obfuscates the reality, which is that children are being cowed into compliance with the Stonewall agenda, and the conversation is/was not 'fake'.