I'd be more interested in whether at some point a defence is put forward that a male person didn't commit rape because they identify as a "she" person:
(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.
It would be a bizarre defence but look at the Interpretation Act 1978:
6 Gender and number.
In any Act, unless the contrary intention appears,—
(a) words importing the masculine gender include the feminine;
The contrary intention could be argued to be provided by the Gender Recognition Act 2004:
9 General
(1) Where a full gender recognition certificate is issued to a person, the person’s gender becomes for all purposes the acquired gender (so that, if the acquired gender is the male gender, the person’s sex becomes that of a man and, if it is the female gender, the person’s sex becomes that of a woman).
It's all a mess. I wouldn't expect anyone to use this successfully in a defence but I wouldn't be surprised to see a Yaniv type using this mess in the future to cause distress.