lone wolf

Woods was seen as a lone wolf in his pomp.

Mr Rowe said he was questioned by police while in custody and it "felt like they'd gone out that day expecting to catch some kind of lone wolf attacker".

"I spent much of my life as a lone wolf," she tells BBC News, "so hyper-independent that it became a defining trait."

But territorial losses and the death of its leader did not end attacks carried out by its many offshoots, or by “lone wolves” embracing its ideology.

He said Mr Yang was not a "lone wolf" but one of thousands of individuals who had penetrated UK institutions.