Idris Elba wants to use his platform to help stop knife crime. The 51-year-old actor explained that while he cannot use his celebrity status to make a difference with global issues, he can and feels he “should” speak up on the topic of stabbings as the number of incidents continues to increase every year in London. He told The Saturday Times: “One thing I’ve learnt from talking to some of the mums whose kids have been killed, is they give you a bag of the clothes your child was wearing the last time you saw them alive. The first time you saw them, they had no clothes on, the last time you see …