This same nonsense is going on in the USA too, only on a larger scale.
In the US, violent male criminals like the UK's Karen White, Paris Green & Ian Huntley are suing, usually successfully, for "sex change" treatment, surgeries & special accommodations in nearly every one of the 50 different state penal systems, as well as in the federal one. But because these cases occur state by state, & the US as a whole is so large, these stories rarely make the national news.
In a recent case from mid-December, a federal judge has determined that Mason Edmo, a violent male sex offender incarcerated in Idaho who claims to be a woman named Adree, must be given "gender confirmation surgery" within six months. Without the surgery, the judge ruled, Edmo is "at risk of irreparable harm" because Edmo is "troubled by thoughts of self-castration" & on two occasions in prison Edmo has cut at his genitals.
Funny thing, though, Edmo's longterm boyfriend prior to incarceration says Edmo's supposed gender dysphoria & female gender identity only emerged after Edmo was imprisoned for sexual abuse of a minor under 16 in 2012. The boyfriend, whom Edmo frequently assaulted & once beat with a frying pan badly enough for Edmo to be convicted & jailed, says Edmo "never once indicated anything of gender dysphoria...He was a predator."
Since Edmo first entered male prison & began claiming he was a woman & had always lived as a woman, Idaho has provided Edmo with female hormones & provided him with other special accommodations for his gender ID issues, though it denied him many requests & penalized him for breaking certain prison rules in order to appear female. As a result, the (female) judge in the case ruled that prison authorities "failed to respond to her pain and medical needs, causing her to suffer harm."
According to the judge, Edmo has "a serious medical condition" and "failure to treat her medical condition could result in significant further injury or the unnecessary and wanton infliction of pain". This, the judge ruled, "amounts to cruel and unusual punishment in violation of the Eighth Amendment" of the US Constitution.
The judge in her ruling noted that there are currently 30 other (male) inmates with gender dysphoria in Idaho state custody. With 1.5 million residents, Idaho is one of the least populous states in the USA, ranking 40th in population. How many of these guys are in prisons in the US overall is anyone's guess, but lawsuits are underway in most every state.