Other prisoners being freed after completing their sentences claimed mobile phones were changing hands inside the jail for around £150.
One inmate, waiting for a relative to pick him up after being released from a six-week sentence, said: “It’s fair to say most of the prisoners are terrified in there but the screws are even more terrified than the prisoners.
“I’m surprised it has taken so long for the inspectors to do something – there are drugs everywhere. The place is a joke.”
Another man, in his 20s, told reporters: “I’ve just spent six weeks in there and the conditions are pretty shit, to be honest – from what I have seen there are a lot of drugs.
“Drugs have taken over the prison and G4S have just let it happen. The prisoners were in control and it doesn’t feel safe.
“There were a lot of people on my wing that just stayed behind the door because they were scared to come out.”
A third inmate being freed from the jail’s main gate said he believed prisoners had gained more influence since a 15-hour riot in 2016 during which a bunch of keys were taken from a warder and used to unlock cells.
“I’ve been inside for five-and-a-half years and I think the prisoners run it, to be honest – and that’s the best way in my opinion.”
Some of the men being released also claimed that trainers were often stolen, leaving more vulnerable inmates wearing flip-flops on wings where even the smallest argument could trigger serious violence.
None of the men would give their names.