Complex sentence: All of this culminated in the role of Littlechap in "Stop the World-I Want to Get Off" in London's West End, and the same role in Warner Brothers' film version of the show.
Split into simpler sentences: All of this culminated in the role of Littlechap in "Stop the World-I Want to Get Off" in London's West End. He played the same role in Warner Brothers' film version of the show.