The “speedboat killer” has been transferred to a northeast prison dubbed the “house of monsters”.
Jack Shepherd is now being held at HMP Frankland Category A Prison in County Durham.
The prison houses some of the UK’s most dangerous prisoners.
Located near the village of Brasside, its inmates include terrorists, murderers and rapists.
These include criminals such as serial killer Levi Bellfield, Soham murderer Ian Huntley and the killer of Sarah Everard, former police officer Wayne Couzens.
The prison was built in 1980 and male prisoners over the age of 21 with sentences of four years or more, serving life or who are considered high risk are held at Frankland.
The former web designer Shepherd, 33, is serving a six-year sentence for causing the gross negligence manslaughter of Charlotte Brown, 24, in December 2015.
As well as a separate four-year stint for attacking a bartender.
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A source said Shepherd, whose story was the subject of an ITV drama last month, was keeping his head down in County Durham Jail.
The source, as reported by the Mirror, said: “He spends his days writing to friends and family and getting along with the other inmates.
“Prison was a humiliating experience for him.”
He and Charlotte, who met via dating site OkCupid, dined at The Shard in London on a first date before Shepherd offered him a ride on his faulty speedboat.
Charlotte, from Clacton, Essex, drowned after being thrown from the boat when it hit a log.
Shepherd fled to Georgia and missed his trial but was extradited.
He had settled with former television journalist Maiko Chanturidze in the former Soviet republic.
He hopes they will be reunited there when he becomes eligible for release in two years.
The source said, “Jack still misses Maiko and Georgia dearly.
“He thinks it’s probably going to be a more welcoming home for him than Britain.”
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