Despite the legal definition of an adult as someone “18 and older,” state courts have held that sexual relationships between students and teachers are against the law.

Is it illegal to date a teacher UK?

It has been illegal in Britain since 2001 for a teacher to engage in sexual activity with any pupil at their school under the age of 18. To be honest, says Alastair, a teacher at a private London secondary school, if a teacher and a pupil really want to start an inappropriate relationship, they will.