Complex sentence: As one of Britain's most respected and versatile musicians, Bennett produced over two hundred works for the concert hall, and fifty scores for film and television, as well as having been a writer and performer of jazz songs for fifty years.
Split into simpler sentences: As one of Britain's most respected and versatile musicians, Bennett produced over two hundred works for the concert hall, and fifty scores for film and television. He was also a writer and performer of jazz songs for fifty years.