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How do you go about trying to change a person's fundamental beliefs? And how do you decide who is in need of state intervention to do so?

Public sector workers now have a legal obligation to refer suspected Islamist and far right extremists to a local body known as a Channel panel. Referees deemed to hold extremist views are offered ideological mentoring, usually on a voluntary basis.

The government says its Channel deradicalisation programme is a success, helping prevent vulnerable people from being drawn into terrorism. But some British Muslims see it as a Big Brotherish state spying operation, wreathed in secrecy and suspicion. John Ware enters the "pre-criminal space" to find out - from the inside - how Channel works.

Producer: Simon Maybin
Researcher: Kirsteen Knight.