As I understand it, we do have such a thing as statutory rape when 'consensual' sex has taken place between an adult and a minor, on the basis that the minor has not got the capacity to give or withhold their informed consent. However I also understand that it is at the discretion of the officials involved in an individual case to determine whether it is applicable or not. It would almost definitely apply to a prepubescent child, but I have known of at least one case involving an under-16 teenager and her peer-group-but-older boyfriend where the statutory rape charge was considered not applicable. The case proceeded as "unlawful sexual intercourse", and the young man in question avoided a prison sentence but was labelled a paedophile and had to sign the sex offenders' register. I could be out of date or lacking understanding on this one.