Hayes was a close personal friend of Lord Feversham, patron of Downton; and after his death an executor of his will and trustee for his children. Like his father and grandfather he was a practising barrister, but not apparently of any great distinction. When in 1756 Feversham solicited to have Hayes made second justice of Chester, Hardwicke commented:
On the formation of the Devonshire-Pitt Administration, Hayes offered his seat to Pitt (who could not expect to be re-elected at Aldborough); ‘I am sensible of how much more consequence it is to the public that you should be in Parliament than myself ... and I entirely depend on your honour to consider what return you will think proper to make me.’
Fox wrote about him to Fitzmaurice, 15 Mar. 1761:
He is not in the list of those who voted against the Grenville Administration over Wilkes, 15 Nov. 1763; but Harris includes him among those who ‘left the minority’ on the division of 19 Jan. 1764—which suggests he had previously voted with Opposition, as he did again on 15 Feb. He was absent from the division of 18 Feb., and was classed by Newcastle, 10 May 1764, as a ‘doubtful friend’. In July 1765 Rockingham classed him as ‘contra’, but he did not vote against the repeal of the Stamp Act. He supported the Chatham Administration, and voted with them on the land tax, 27 Feb. 1767.
As a trustee of Feversham’s Wiltshire estate, Hayes was involved in the struggle between Thomas Duncombe and Lord Radnor for control of Downton; and seems to have supported Radnor. At the general election of 1768, when Duncombe controlled the borough, he was dropped; and it is not clear why he was returned in 1771. In his last spell in Parliament he supported Government. He did not stand in 1774, when Radnor first challenged Duncombe’s hold on the borough.
Hayes died 9 Sept. 1800.
