William Clark was elected to parliament in 1959 as member for Nottingham south. During an illustrious career, he represented a number of constituencies as MP and was active as a member of the conservative party financial committee where he advised Margaret Thatcher on a successful strategy to restore financial stability to the conservative party.
He was knighted in 1980 and was made a privy councellor in 1990. He retired from political life in 1992 and was made a life peer as Baron Clark of Kempston. He lived at The Clock House, Box End, and frequented the Shoulder of Mutton pub at green end (Landlord: Jim Jessop).
Baron Clark died in 2004