Dad ‘murdered at gym run by Idris Elba’s kickboxing trainer’

A father was stabbed to death at a gym run by actor Idris Elba’s kickboxing trainer by a knifeman who ‘though he had conned him’ out of some money, a court heard. Charles Riddington, 37, allegedly launched a ‘merciless’ attack on George Barker, 24, moments after he arrived at the Double K Gym in Bexley, southeast London, to train on 14 November 2016. Mr Barker, whose partner had given birth to their baby daughter just five days earlier, suffered ‘horrific’…