Complex sentence: Bragg began his career in 1961 as a general trainee at the BBC, spending his first two years in radio at the BBC World Service, then at the BBC Third Programme and BBC Home Service.
Split into simpler sentences: Bragg began his career in 1961 as a general trainee at the BBC. He spent his first two years in radio at the BBC World Service, then at the BBC Third Programme and BBC Home Service.