Complex sentence: He served as Secretary of State for Defence in 1974, in the government of Edward Heath, and, he also served in the government of Margaret Thatcher, as Lord Privy Seal from 1979 to 1981.
Split into simpler sentences: He served as Secretary of State for Defence in 1974, in the government of Edward Heath. He also served in the government of Margaret Thatcher, as Lord Privy Seal from 1979 to 1981.