	Jewkes, was returned unopposed as a Whig Member of Parliament for Bridport at a by-election on 20 February 1730. In Parliament he voted with the Administration in all known divisions. After 1733 he was political agent and intelligence gatherer for the Duke of Newcastle in the Petworth area. He did not stand at the 1734 British general election but was returned as MP for Aldborough, the Duke’s pocket borough, at a by-election on 19 February 1735. He was returned there again unopposed at the 1741 British general election.