Knight, a former Friend of the People and an associate of Sir Francis Burdett*, joined the radical banker Douglas Kinnaird† in his attempt to wrest both seats at Bishop’s Castle from the control of the Clive family in 1820. They were involved in a double return, but the inquiry proved favourable to their opponents after a redefinition of the right of election. When Knight did return to Westminster in March 1823 it was in the unlikely guise of Member for Rye, where the Lamb family had customarily returned ministerialists. The patron, the Rev. George Augustus Lamb, decided to ‘introduce an opposition man’ as an act of vengeance against the Liverpool government, whose refusal to give him church preferment he largely blamed for the ‘poverty’ which compelled him to make the maximum financial gain from his electoral interest. Thus he turned out the sitting Member John Dodson, his sister’s brother-in-law, and sold the seat to Knight.
Knight divided silently and somewhat spasmodically with the advanced wing of opposition. He was in small minorities for economy and retrenchment, 17, 18, 25 Mar., 9 June 1823. He voted against the naval and military pensions bill, 14 Apr., for repeal of the Foreign Enlistment Act, 16 Apr., and for parliamentary reform, 24 Apr. He paired in favour of Scottish reform, 2 June. He voted against the Irish insurrection bill, 12 May, 24 June, and in support of the Catholic petition on the administration of justice in Ireland, 26 June. He divided for abolition of the death penalty for larceny, 21 May, 25 June, and inquiry into the coronation expenses, 19 June 1823. He may have been in Rome in January 1824,
Knight did not find a seat at the 1826 general election, but in December that year he came forward on a vacancy for the venal borough of Wallingford, claiming the support of its long-serving Whig Member Hughes and emphasizing his opposition politics. Dodson, possibly seeking revenge for the Rye episode, threatened to oppose him but thought better of it. Knight defeated the corporation candidate.
At the general election that summer he was returned in second place for Wallingford after a contest.
Knight’s first son Henry had died in Paris in 1800, aged five, and he evidently never acknowledged the paternity of his reputed second son Henry Charles (1813-87), who took holy orders in 1838. How far this repudiation was connected with his wife’s adultery with his sister’s brother-in-law, Colonel Joseph Fuller, for which he was awarded £7,000 damages in 1805, is not certain.
