One of the country's most infamous prisons witnesses frequent violent attacks, and countless disturbing incidents and has housed some of the UK's most notorious criminals. HMP Belmarsh, located in Thamesmead, South London, is a high-security Category A prison, which, according to the government website, houses "male prisoners who, if they were to escape, pose the most threat to the public, the police or national security". Belmarsh is where some of the UK's most violent offenders have, and continue to serve out their sentences, including "Grindr Killer" Stephen Port who killed four young men and raped many more and serial rapist police offer David Carrick.

Both Wayne Couzens , copper killer of Sarah Everard and child murderer Ian Huntly spent time there before they were both moved to other prisons. Wikileaks founder Julian Assange also currently presides at Belmarsh while the US debate ending his extradition. The facility imposes extremely strict rules on inmates, but despite the fact that inmates are confined to their cells for long periods of the day and watched and controlled closely by staff, newly revealed records show that this has not stopped violent assaults and other incidents from taking place.

According to a Freedom of Information request released by the Ministry of Justice (MoJ), there were more than 280 assaults at Belmarsh in 2023 alone, reports the Daily Star . In an incident log obtained by the Metro , a report reveals a member of staff at the prison was subje.