In 1807 Deedes responded to a late invitation from ‘a very numerous body of the freeman’ to contest Hythe, which lay close to his main estate. Recommended by Sir Philip Hales of Bekesbourne, a groom of the bedchamber, as ‘a gentleman whose discharge of his duties as a magistrate and country gentleman entitled him to support’, he gained second place in the poll after a contest.
The Whig Lord Thanet reported to Lord Holland, 30 Sept. 1812, that Deedes ‘is a rich man but I have heard from pretty good authority he would not spend money. He is Tory and anti-Catholic to the bone, in other respects not popular.’
