This is NOT based on any research or measuring of data at all, but has it been discussed that the male-bodied prisoners who identify as women and aim to be transferred to women's prisons are not a trans issue but a prison safety issue?
Some of these men (most, to my eyes?) appear to be men who are traditionally unpopular in prison - child abusers, rapists - and having realised that the prison system is completely unable/unwilling to keep them physically safe, are they taking the only "logical" route to safety - being transferred to a women's prison? (A system that also blatantly lacks proper protections for inmates as we have just seen in the case of Karen White.)
If you face a very real risk being killed or maimed in prison, why not manipulate the self ID system that gives you an "out"?
Is prisoner safety just completely shit in the UK? And if prison was safe for prisoners would we be seeing so much (surely cynical) transing while an inmate (Karen White, Carrie/Gary Cooper etc)?