Bramston sat for Essex unopposed on the ‘old Tory interest’. Since 1784 he had been a supporter of Pitt, though silent and a reluctant attender. He was regarded as a representative of the agricultural interest and chaired the committee on the corn bill in March and April 1791. He was at that time listed hostile to the repeal of the Test Act in Scotland. On 25 Aug. he wrote to Pitt, suggesting a veto on wheat importation on account of the good harvest at home. On 23 Nov. he wrote to his friend the Speaker, this time to urge Pitt to do something for his sons Edward and William. He opposed lowering the Greenland whale bounties, 24 Feb., and criticized the wine licence bill, 24 Apr. 1792. On 4 Jan. 1793 he assured Pitt that there was no need to circularize him for his attendance, though he would be briefly delayed in the country. In January 1796 his protégé, Francis Smythies, recorder of Colchester, offered to bring Bramston’s son in for Harwich, but nothing came of it.
On 3 Aug. 1796 Bramston informed the Speaker that he was ‘somewhat impatient for a little sunshine in politics as well as for our harvest’. He was concerned at the price of meat, the shortage of specie, the savagery of the French revolutionaries and the war weariness of the militia.
In 1802 Bramston retired and was unanimously thanked by the county for his services: he gave his blessing to the candidature of his successor Eliab Harvey. On 13 June 1803 he wrote to Addington deploring Pitt’s rift with him.
