The law at present is thus:
(1)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.
Section 75:
(2)The circumstances are that—
(a)any person was, at the time of the relevant act or immediately before it began, using violence against the complainant or causing the complainant to fear that immediate violence would be used against him;
(b)any person was, at the time of the relevant act or immediately before it began, causing the complainant to fear that violence was being used, or that immediate violence would be used, against another person;
(c)the complainant was, and the defendant was not, unlawfully detained at the time of the relevant act;
(d)the complainant was asleep or otherwise unconscious at the time of the relevant act;
(e)because of the complainant’s physical disability, the complainant would not have been able at the time of the relevant act to communicate to the defendant whether the complainant consented;
(f)any person had administered to or caused to be taken by the complainant, without the complainant’s consent, a substance which, having regard to when it was administered or taken, was capable of causing or enabling the complainant to be stupefied or overpowered at the time of the relevant act.
Section 76:
(1)If in proceedings for an offence to which this section applies it is proved that the defendant did the relevant act and that any of the circumstances specified in subsection (2) existed, it is to be conclusively presumed—
(a)that the complainant did not consent to the relevant act, and
(b)that the defendant did not believe that the complainant consented to the relevant act.
(2)The circumstances are that—
(a)the defendant intentionally deceived the complainant as to the nature or purpose of the relevant act;
(b)the defendant intentionally induced the complainant to consent to the relevant act by impersonating a person known personally to the complainant.
My issue is how we're interpreting "reasonable". While there is case law on this, the case law in this area (like many others) is also reflective of the prevailing cultural norm.
IMO it would be better to change the law from:
(c)A does not reasonably believe that B consents.
to:
(c)A has not take such steps as necessary to establish that B consent.
This subtly changes the focus from what B has done to give A the impression that B consents, to what A has done to establish if B consents, thus placing far more responsibility on A - which as the person doing the penetration and with less to lose than B, seems to me to be more just.