 He was elected MP for Wallingford, a constituency which several of his ancestors had served in parliament at the 1715 general election and sat until his death four years later.It was rumoured in June 1702 that Dunch would be created a baron of England.Gossip also asserted in April 1704 that his father-in-law Colonel Charles Godfrey would become Cofferer of the Household and that Dunch would succeed Godfrey as Master of the Jewel Office.