Complex sentence: He now teaches at St. Pauls School in London, having previously taught French and German at Hampton School in Middlesex, and is good friends with Graham Seel, who plays the headmaster in the film' The History Boys.
Split into simpler sentences: He now teaches at St. Pauls School in London, having previously taught French and German at Hampton School in Middlesex. He is good friends with Graham Seel, who plays the headmaster in the film' The History Boys.