A new "ghost train" system is to be set up in prisons in England and Wales to move the most troublesome Islamic extremist inmates between isolation units, the justice secretary has indicated.

Liz Truss confirmed that specialist isolation units to hold the highest-risk prisoners would be created in high-security jails. She said the lessons of the Maze and Maghaberry prisons, which became hothouses for terrorists, had been studied.

"We have looked at what happened in Northern Ireland and the experience of other European countries who are facing a growth threat of extremism, as we are in Britain," Truss said.

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