Founded quietly in 2003, then expanded after the 7/7 London bombings, which killed 52 people, Prevent started on a small scale. But a rising drumbeat of terror attacks over the next decade prompted calls for expansion.

After the murder of fusilier Lee Rigby outside an army barracks in south-east London in 2013, prime minister David Cameron told parliament: “When young men born and bred in this country are radicalised and turned into killers . . . we have to do more.”

What emerged was a tougher approach to pre-criminal extremism than in perhaps any other country. New legislation requires public officials working in schools, universities, hospitals and local councils to report on individuals showing radical tendencies.

oh I TOTALLY see where this is all going

judge dredd