[3] The freedom of the borough Wallingford was conferred on him on 17 October 1695, and he was at one time proposed as its high steward, but was defeated by Lord Abingdon, who polled fifteen votes to his six.
He was returned unopposed as Member of Parliament for the borough of Cricklade at the two elections in January and November 1701 but was defeated in a contest in July 1702.
In fact the reward for his services was the position of Master of the Household to Queen Anne on 6 October 1708.
When the comptrollership fell vacant on Sir Thomas Felton's death, in March 1709, Dunch tried for it in vain.
William Dunch, auditor to the Mint for Henry VIII and Edward IV, represented Wallingford (1563), and was High Sheriff of Berkshire (1569–1570).
Edmund's son Hungerford Dunch (1639–1680) was returned for Wallingford in 1660 but elected to serve for Cricklade.
His wife, who was one of the beauties commemorated in the Kit-Cat Club verses, was half-sister to the illegitimate children of James II.