Having always been open about his struggles with narcotics, Donovan shared that he has endured many sleepless nights “snorting cocaine on his own.” Admitting that he first turned to the harmful substances in a bid to “be cool” nothing could have prepared the star for what was going to happen next. Costing him hundreds of thousands of pounds Donovan’s addiction lasted for the best part of a decade. The height of his addiction was when Donovan was playing Joseph in the West End production of Joseph and the Amazing Technicolor Dreamcoat. Explaining the graphic details of his reliance on drugs he shared that he would come off stage, get out…