This is from last year. Written by law lecturers from Bournemouth University.
Apologies, some of the phrasing and language used is (presumably) unintentionally offensive.
https://www.starsdorset.org/blog/sexual-offences-act-2003
'This blog post argues that the Sexual Offences Act 2003’s[1] penile penetration requirement is not fit for purpose. Whilst the Sexual Offences Act modernised ‘rape’ through the introduction of an agendered victim, it is now time to introduce the agendered perpetrator. Doing this will allow the ‘law of rape’ to move beyond heteronormativity and better capture the diverse sexualities and gender identities present in contemporary society.'
...
'we advocate for a more expansive ‘crime of rape’, which contains more nuance and fragmentation.'