CEP Senior Advisor Ian Acheson writes: "Hall’s report critically examines the contemporary threat of violent extremism from within the prison walls – where at the last count reside some 230 offenders convicted of terrorist offences and a greater number who are at risk of radicalisation or already radicalised. The vast majority of these offenders are motivated by Islamist extremism which explains his report’s focus."

CEP Senior Advisor Ian Acheson writes: "The headline findings of this latest report — which included the incredible fact that terrorists are setting up Sharia courts inside — did not surprise me though. 

Six years ago I led an independent review of the same problem and made 69 recommendations for change, many of which were either ignored or watered down."

"Ian Acheson, a former prison governor and senior adviser at the Counter Extremism Project, said the official narrative that the far-right is the fastest growing threat is a 'comfort blanket' obscuring the 'patently more potent threat of Islamist extremism'."