Complex sentence: He returned to UK in his late thirties, and has worked for the BBC, Radio Mercury, Southern Sound, and LBC, before joining talkSPORT in 2004, from which he parted company in 2008.
Split into simpler sentences: He returned to UK in his late thirties, and has worked for the BBC, Radio Mercury, Southern Sound, and LBC. He joined talkSPORT in 2004, from which he parted company in 2008.