Complex sentence: He became editor of the "9 O'Clock News" at the early age of 34 and was appointed director of BBC News and Current Affairs Television in 1990 and, combining TV and radio, became director of News in 1993.
Split into simpler sentences: He became editor of the "9 O'Clock News" at the early age of 34. He was appointed director of News and Current Affairs Television at the BBC in 1990 and, combining TV and radio, became director of News in 1993.