There will be small units for TW in male prisons and TM in female prisons
I’m not sure it’s necessary to hold TM separately within the female estate. They aren’t targeted for abuse by female prisoners and they aren’t an obvious safeguarding risk to the other prisoners as they are female sized and have female strength (barring the handful of bodybuilders who’ve made the most of T being a performance enhancing steroid!)
Only a teeny fraction get a surgically built phallus and a smaller fraction still have an erectile device added, so they don’t really need have weaponisable genitalia the way men do.
Plus biological female = lower risk for sex crimes anyway.
And there are so few TM prisoners that a separate unit will risk being de facto segregation, which is against their (genuine!) universal human rights.
So the awkwardness is that TM will have to be ‘outed’ because their fellow prisoners will need to know they are definitely, absolutely, biological women, even if they have beards
And that is a problem IF they have a GRC, because while the public aren’t sworn to secrecy, official bodies are.
So actually, reform of the GRR has the potential to shit all over transmen in prison, because if you are legally forbidden from telling the women on the wing the transmen are also women, the prison service would be left with the choice of de facto segregation or chucking them in the male estate (and you wouldn’t even be able to put them on the vulnerable prisoners wing because they are biological females, who almost always still have vaginas, so locking them in with a whole wing full of male nonces is out of the question, unless it’s the plot of a horror film).
Once again, trans activism reveals itself as a Mens Sexual Rights Movement, because what is good for men who say they are women is shit for women who say they are men.