The shocking video shows the woman performing a sex act at the Category A jail in south West London.

The two go on to have sex while the other cellmate films on a mobile phone.

The friend, who is smoking while recording, says: “Guys we've made history, this is what I'm telling you.”

Later in the video he adds: “This is how we roll in Wandsworth.”

https://www.lbc.co.uk/news/police-investigate-video-hmp-wandsworth-inmate-cell/