Complex sentence: He served as Fisheries Minister from 1997 to 2003, followed by Minister for Environment and Agri-Environment in DEFRA, but left government in the May 2006 reshuffle.
Split into simpler sentences: He served as Fisheries Minister from 1997 to 2003. He was Minister for Environment and Agri-Environment in DEFRA but left government in the May 2006 reshuffle.