Re: Rape as defined
"Assault by penetration"
Penalty: The offence is indictable only with maximum penalty of life imprisonment.
Code for Crown Prosecutors - considerations
This offence is in essence similar to rape and a prosecution is almost certainly required in the public interest.
DPP: Rape and Sexual Offences:
Chapter 2: Sexual Offences Act 2003 - Principal Offences, and
Sexual Offences Act 1956 - Most commonly charged offences