Complex sentence: Doncaster-born Tomlinson began his career as an actor, initially appearing in ITV drama "Fat Friends" as an extra, he also went on to appear in another ITV drama film "If I Had You" and BBC's "Waterloo Road".
Split into simpler sentences: Doncaster-born Tomlinson began his career as an actor, initially appearing in ITV drama "Fat Friends" as an extra. He also went on to appear in another ITV drama film "If I Had You" and BBC's "Waterloo Road".