When maths teacher Kevin Lister received a message from his 17-year-old student, Lizzie, telling him she would now like to be called Liam, he was concerned.
It was September 2021, only days into the new term at the college where he worked in the South West, and Lizzie had previously shown no signs of wanting to identify as a boy.
‘I’d experienced this in my previous school, where a girl had wanted to transition,’ says Mr Lister, a 60-year-old father