1. Sexual assault by penetration S
(1) If a person (“A”), with A's penis—
(a) without another person (“B”) consenting, and
(b) without any reasonable belief that B consents, penetrates to any extent, either intending to do so or reckless as to whether there is penetration, the vagina, anus or mouth of B then A commits an offence, to be known as the offence of rape.
(2) For the purposes of this section, penetration is a continuing act from entry until withdrawal of the penis; but this subsection is subject to subsection (3).
(3) In a case where penetration is initially consented to but at some point of time the consent is withdrawn, subsection (2) is to be construed as if the reference in it to a continuing act from entry were a reference to a continuing act from that point of time.
(4) In this Act— “ penis ” includes a surgically constructed penis if it forms part of A, having been created in the course of surgical treatment, and “ vagina ” includes—
(a) the vulva, and
(b) a surgically constructed vagina (together with any surgically constructed vulva), if it forms part of B, having been created in the course of such treatment. Commencement Information I1 S. 1 wholly in force; s. 1(4) in force at Royal Assent see s. 62(2) ; s. 1 otherwise in force at 1.12.2010 by S.S.I. 2010/357 , art. 2(a)