Complex sentence: He went on to perform in national tours, including 18 months in "Godspell" for producer Cameron Mackintosh, and acted in television series and movies both in the UK and the US.
Split into simpler sentences: He went on to perform in many national tours, including 18 months in "Godspell" for producer Cameron Mackintosh. He also acted in numerous television series and movies both in the UK and the US.