Complex sentence: In the 1950s, he moved back to Somerset, where he spent the rest of life running a farm on the family estate, and becoming a Conservative county councillor in the 1980s, and was chairman of the county council from 1989 to 1992.
Split into simpler sentences: In the 1950s, he moved back to Somerset, where he spent the rest of life running a farm on the family estate, and became a Conservative Party county councillor in the 1980s. He was chairman of the county council from 1989 to 1992.