In Bute’s list Manners was classed as a follower of Newcastle. He does not appear in Henry Fox’s list of Members favourable to the peace preliminaries, December 1762, but in autumn 1763 was described by Jenkinson as ‘pro’. Rockingham, July 1765, also considered him as ‘pro’, but he voted against the repeal of the Stamp Act, 22 Feb. 1766. He did not vote on the land tax, 27 Feb. 1767, but was classed by Newcastle, 2 Mar. 1767, as ‘Administration’.
In 1762 he inherited large estates in Nottinghamshire from his brother; took the additional name of Sutton (by which he was usually known); and in 1768 thought of standing for Nottinghamshire or Leicestershire,
In 1780 Manners Sutton successfully contested Newark in place of his son, George Manners Sutton, who was returned unopposed at Grantham. Manners Sutton remained in opposition till the fall of North. There is no record of his having spoken in the House. On 5 Apr. 1782 he asked his nephew the Duke of Rutland to recommend to the new ministers his succession to the titles and honours of his grandfather Lord Lexinton, but without success.
He died 7 Jan. 1783.
