Downing was returned for his cousin’s pocket borough (which he inherited in 1749), and generally voted with the court.
He was closely connected with Lord Hardwicke.
The current report of some gentlemen being very soon to be created peers, and having nothing from your Grace, has given me great uneasiness; as I can’t tax myself with any one action in my whole life that has not been with the warmest and most sincere attachment to the present happy establishment and ministry, and will not suffer myself to think that I am to be laid aside, as I have had so many assurances of your Grace’s intention to serve me.
Moreover, he had ‘never asked any place, pension or employment’, and so had ‘been very little troublesome to any part of Administration’.
Newcastle failed to obtain for him the peerage, and Downing (probably most unjustly) held him responsible. When the Newcastle-Pitt Administration was being formed, Downing wrote to Hardwicke, 16 June 1757, that while his feelings for Hardwicke remained unchanged, he could by no means think of acting with Newcastle, and did not desire to have ‘the most distant appearance of the least connexion’ with him; and on 18 June 1758, that he would not re-elect Soame Jenyns, but would return a Member ‘that has as little reason as myself to be satisfied with the Duke of Newcastle’. On Jenyns vacating the seat in November 1758, Downing placed it at Fox’s disposal. His friendship with Fox was now very close, and on 4 May 1759 he told him that the borough of Dunwich would ‘during your life be absolutely under your directions and consequently the choice of the Members in your option.’
In June 1762 Fox described Downing as ‘very infirm’;
He died 6 Feb. 1764.
