https://www.thesun.co.uk/news/29307316/inside-britain-notorious-prison-pentonville-neurodiversity/
Pentonville is designed to hold 500 men but currently has about 1,200.
Shockingly, only a hundred or so of its inmates have been found guilty of a criminal offence.
The rest are on remand, imprisoned for up to 14 months before standing trial - where a large number end up acquitted.
It is hard to think of an environment less promising as a place for troubled young men to turn their lives around.
But Pentonville's staff have worked against the odds to create a more hopeful environment - including the new neurodiversity wing.
Pentonville is split between arrival cells, the general prisoners wing, the drug and alcohol addiction wing and the gangs wing.
The gangs wing is in turn split up to keep apart rivals from the Tottenham and Hackney postcode wars.
When hostile inmates cross paths, disaster can follow - like when 21-year-old Jamal Mahmoud was stabbed to death in G wing in 2017.
But the ground floor of G wing has now been taken over by the pioneering neurodiversity unit - which The Sun visited this week.
Most prisoners currently behind bars in the UK have mental health issues, learning disabilities or neuro-diverse needs like autism, OCD or ADHD.
Many also suffer from heartbreaking childhood trauma - which is even more difficult to process because of their special needs.
A Pentonville source told how many inmates in the prison were introduced to crack, heroin or alcohol as babies or toddlers.
Others grew up witnessing or suffering horrific domestic abuse, including sexual abuse.
And many have spent their lives in extreme poverty or the notorious pipeline from institutional children's care homes to prison.
Youngsters growing up with these ordeals often stop going to school by their early teens or get excluded after lashing out.
The result is that many end up dogged with mental health troubles or substance addiction, while lacking even basic literacy or numeracy.
Any of us would struggle if we were dealt such a hand - but it is even harder for a person with neuro-diverse needs.
Overseen by Custodial Manager Neil Fraser, the NDU wing hosts 43 inmates with severe learning disabilities or mental health issues.
When The Sun visited the wing, they were on association - the hour where prisoners can leave their cells to mingle.
Our reporter went inside the wing's sensory room, a converted cell kitted out with beanbags and soothing multi-colour displays.
Prisoners who are panicking, depressed or angry can come here for around twenty minutes by themselves to calm down or even nap.
A prison officer who has served on the wing told how violent trouble-makers in the general wings have become far more gentle in NDU.
They told The Sun: "We get to know all of them as individuals, beyond just their names and offences.
"I know if a certain prisoner is particular about how his spaghetti is cooked or whether it should be in a plate or bowl.
"Or whether they are calmer with their cell door open or shut, and when.
"It massively improves their mood and makes them much less of a danger to others or to themselves.
"On the general wing there are hundreds of prisoners, many of whom have similar needs.
"I'm lucky if I know their name, what they're in for and when their last visit was.
"The NDU wing is a model of how all prisons should be run in this country."
Prisoners in the wing are given the freedom to express themselves with safe materials.
One burly lag showed The Sun a dozen or so model planes, trains and cars he has made from mulched-up crisp packets and milk cartons.
Another has lined his room with his drawings of animals and landscapes, as well as a Chelsea pennant.
Officers were seen chatting and even patting inmates in a display of warmth unimaginable in some UK prisons.