It is mostly related to special educational needs and disability.
www.theguardian.com/.../it-was-damaging-him-the-spiralling-number-of-children-refusing-to-go-to-school
Whole system is totally broken ,la's spend more on trying to get out of any additional expense than providing it .
Schools bully parents with "difficult " children to unroll ,then left with no education . It's a national disgrace .