Kickboxer books life sentence for drug debt murder

A kickboxer who ‘mercilessly’ stabbed a young father to death at a gym run by Idris Elba’s trainer over a £20,000 drugs debt is facing a life sentence. Charles Riddington, 37, lay in wait for George Barker, 24, behind the front door of the Double K Gym in Bexley, southeast London, with his hood up and wearing a pair of goalkeeper gloves. Within seconds of Mr Barker walking in Riddington launched a ‘brutal’ assault, knifing him 17 times to his…