A Sex offender who is convicted of rape is
A person (A) commits an offence if—
(a)he intentionally penetrates the vagina, anus or mouth of another person (B) with his penis,
(b)B does not consent to the penetration, and
(c)A does not reasonably believe that B consents.
(2)Whether a belief is reasonable is to be determined having regard to all the circumstances, including any steps A has taken to ascertain whether B consents.
(3)Sections 75 and 76 apply to an offence under this section.
(4)A person guilty of an offence under this section is liable, on conviction on indictment, to imprisonment for life.
https://www.legislation.gov.uk/ukpga/2003/42/section/1
Sex offenders in the UK who have been convicted of 1 or more counts of rape on children
2016 Keighley Grooming Gang Members aged 19 to 63 get 140 years for raping a 13yr old girl
Twelve men sentenced for sexual exploitation of Keighley teenager “She was only 13 or 14 when the 12 of you took such terrible and heartless […]