According to official figures, men are five times more likely to carry out sexual assaults or rape against inmates while housed in women's prisons.

That's likely a massive underestimate, because the prison service records a lot of TIM offences in women's prisons as "woman on woman" offences.

Also in UK law women can't commit rape because it has to involve a penis.

I read it as, they are 5x more likely to rape while in a womens prison than while in a mens prison