Policy and legislation Prison Rules 1999 'Separation centres' for extremist prisoners Following the publication of the Acheson Review into the perceived threat of Islamist extremism in prisons, in August 2016 the government announced the intention to create specialist units within high security prisons 'to allow greater separation and specialised management of extremists who posed the highest risk to other prisoners' ( Government response to the review of Islamist extremism in prisons, probation and youth justice, August 2016, page 4). Accordingly, amendments have been made to the Prison Rules 1999 SI No 728 (Prison Rules), which came into force on 12 ...