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"Muslims run it. Muslims run the prisons and there's nothing the screws can do about it. For a Muslim you'd say it's good but for a non-Muslim, it's very, very bad," a former inmate called Jay says.
It is a claim which is backed by former prison officers and other inmates.
Jay, 24, is a Muslim and has been in and out of prison for most of his life. He openly admits to helping to convert non-Muslim inmates to Islam and has meted out violence against anyone who dares to "disrespect" his religion.