Complex sentence: He was educated at King's College School, Wimbledon and he devised the long-running BBC Radio 4 series "Desert Island Discs" in 1942, which he also presented it for 43 years.
Split into simpler sentences: He was educated at King's College School, Wimbledon. Then, in 1942, he devised the long-running BBC Radio series "Desert Island Discs", which he also presented for 43 years.