Our roadshow audience in Bristol heard 14-year-old Arafat Osman, on the left above, explain some of his pals carried a blade to earn respect from their peers.
He told how youths walk the streets armed with any weapon they can get their hands on. "They think it makes them seem big," he added. "They never think that they'll be caught."

Following disturbing stories from victims of violence, the anti-knife campaign's organiser Shirley Marshall asked the four youngsters to don the tops—and they quickly agreed.
She said: "It's encouraging to see them wearing these t-shirts after being made aware of the dangers of carrying knives."