CEP Senior Advisor Ian Acheson writes: How do you break the rule of law inside our jails? You could do worse than try to murder a prison officer on duty, which by all accounts nearly came to pass yesterday. The terrorist Hashem Abedi, the brother of the Manchester Arena bomber, reportedly came within seconds of doing so in a frenzied attack on prison officers in the separation unit of HMP Frankland. Three were sent to hospital, seriously injured by a combination of stab wounds and burns from hot oil. I know a thing or two about separation units. I called for their creation when I did an independent review of Islamist extremism in our prisons, as ordered by the editor of this magazine, who was then Justice Secretary. I made almost 70 recommendations to fix serious and systemic failings in the prison service when it came to dealing with the cancer of violent extremism.