Excerpt:
The author of a landmark review of extremism in British prisons has defended a controversial strategy to separate "subversive offenders" from other inmates.
The UK Ministry of Justice opened its first separation center in July and plans to open two more in the coming months — housing a total of 28 inmates.
It comes as Prime Minister Theresa May put Britain on its highest security footing following a London commuter train bombing that injured 30 people on Friday.
Separating inmates was one of the central recommendations of a review into extremism in prisons led by Ian Acheson, a former prison governor, in 2016.