A woman has been arrested after a video emerged allegedly showing a prison officer having sex with an inmate at a south London prison. 

An investigation was launched after police were made aware of a video on social media reportedly filmed inside a jail cell at HMP Wandsworth. 

The Metropolitan Police said a woman was later arrested on suspicion of misconduct in a public office on Friday. 

It is not known when the footage was taken.

The force added: “She has been taken into police custody. Enquiries continue.

“We remain in close contact with the Ministry of Justice.”

A Prison Service spokesperson said: “Staff corruption is not tolerated and the former prison officer allegedly featured in this video has been reported to the police.

“It would be inappropriate to comment further while they investigate.”