The study also found that 75 per cent of young people do not think London mayor, Boris Johnson will be able to reduce knife crime. The poll was carried out by BBC London and quizzed 501 young people aged between 13 and 18 in the London boroughs of Brent, Croydon, Hackney, Lambeth, and Southwark. Additionally, 45 per cent of young people said they knew someone who had been a victim of knife crime and 32 per cent said fear was a...