In England and Wales, truancy is a criminal offence for parents.[6] Since 1998, a police officer of or above the rank of superintendent may direct that for a specified time in a specified area a police officer may remove a child believed to be absent from a school without authority to that school or to another designated place....
It's not that widely known, but you can remove your child from state education as a parent and teach them yourself. You just have to tell the local authority you're doing so in writing.