Original: After leaving school, he worked behind the scenes at the open air theatre at Regent's Park as a prompter, then an assistant stage manager (ASM) on a tour of The Merry Widow, and then at Theatre in the Round in Scarborough.
Simplified: He worked behind the scenes at the open air theatre at Regent's Park as a prompter (helping actors who forgot their words). He later worked as an assistant stage manager (ASM) on a tour of The Merry Widow.