Also worth pointing out: compare the numbers of category A prisoners for the male and female estate.
There are a number of category A prisons for men. There are so few category A women prisoners there is not even one designated prison for them.
A category A male prisoner moving from the mens estate to the women's estate is automatically moving to an easier, lower regime than they would be allowed if they were in the men's estate. Comparable women prisoners number something like 8-15 at most in the entire estate.
Transwomen are male. That is what the trans means. No male people should be housed in the female estate, and it is especially outrageous to inflict male serious sex offenders upon the exact group they offended against to meet the choices and needs of the male prisoner. Access to female people regardless of their consent is not a right. Those female people insisting that it should be are very welcome to go be locked up with these prisoners and to personally provide the female company and nurture they feel should be available. Their body, their choice, and presumably they'll accept the risk or any actual harm to themselves as properly risk assessed, nothing to worry about, and not mind if it happens.
I'd also repeat for those at the back: reflect on what 'serious sex offender' in terms of a several year prison sentence actually means. Bearing in mind that less than 1% of rapes ends in a successful prosecution, never mind a prison sentence. To be imprisoned, for several years, under the label of 'serious sex offender' - just reflect on the number and severity of crimes committed against women and/or children for a court to award that? The danger seen to the general public to award that?
Some people's boundaries and sense of right and wrong is just beyond fucked. There is nothing about this that is ok. Nothing.