Britain's head of counter-terrorism policing said on Thursday the police had serious concern about a rise in the number of young people and children becoming caught up in far-right extremism.
Matt Jukes said youngsters, mainly boys in their early teens, were becoming self-radicalised online and then progressing to actually planning terrorist attacks.
"We're talking about boys principally 14, 15 years old," Jukes told reporters. "This is a group which is substantially younger than we have seen in the past."