Idris Elba launches his charity pop-up in Shoreditch to help prevent knife crime. | Daily Mail Online

Idris Elba has said tackling serious youth violence is a marathon, not a sprint but feels progress is "moving in the right direction".The 52-year-old Luther actor launched a campaign earlier this year calling for an immediate ban on machetes and so-called zombie knives and met Sir Keir Starmer in September to launch a new anti-knife crime coalition.To celebrate the progress made this year, Elba has opened a Christmas pop-up in central London with his initiative Don't Stop Your Future (DSYF), wh