Guardian: Not many sixth-form teachers from east London can claim to have said “No” to Johnny Depp, but Saci Lloyd is getting used to her double life. By day, she teaches A-level students at an inner-city college: by night, she is one of Britain’s most successful crusading authors. Her first book, The Carbon Diaries 2015, shortlisted for the Costa Book Awards last year, already has a slavish following among teenagers in this country and in America. The futuristic story introduced the world to a …