Complex sentence: Boscawen was interested in the National Health Service and sat on its London Executive Council from 1954 to 1965, and in Parliament he was on the backbenchers Health Services Committee and vice-chairman from 1974 to 1979.
Split into simpler sentences: Boscawen was interested in the National Health Service and sat on its London Executive Council from 1954 to 1965. Also, he was on the backbenchers' Health Services Committee and vice-chairman from 1974 to 1979.