His elder brother James being Henry Addington’s brother-in-law and appointed a lord of the Admiralty in Addington’s administration in 1801, Adams was recruited into Parliament in support soon afterwards. The opening was at Weymouth where he came in on the Pulteney interest and survived contests in 1802, 1806 and 1807. A company stockholder entitled by 1806 to three votes for the directorate, he was on the committee chosen on 9 Dec. 1801 to regulate the East India judicature.
It was in 1809 that Adams began to exceed his brief as a follower of Lord Sidmouth. After voting against the convention of Cintra, 21 Feb., he frequently questioned witnesses at the bar and also appeared in the minorities against the Duke of York, 15-17 Mar. He explained on 17 Mar. that he regretted having to vote thus, but the evidence seemed to warrant it. He was again in the minority on the allegations of ministerial corruption, 25 Apr. 1809, and on 15 June went so far as to vote for Burdett’s reform motion. On 9 Nov. 1809 Sidmouth sent Charles Bragge Bathurst a letter to him from Adams renewing his ‘oath of allegiance’ and instructed him to destroy it.
In the ensuing session he approved the Regent’s household grant, 16 Jan. 1812, opposed Morpeth’s critical motion on Ireland, 4 Feb., and called for some ‘additional mark of gratitude’ to Wellington, 10 Feb.; but he sided with opposition on the droits of Admiralty, 21 Jan., for the offices in reversion bill, 7 Feb., and for the abolition of McMahon’s sinecure, 21 and 24 Feb. He approved the expulsion of Benjamin Walsh, 5 Mar., and deprecated Whig intervention on behalf of the Princess of Wales, 23 Mar. When Sidmouth rejoined the government, his opposition ceased. On 14 Apr., with reference to his lack of opposition to McMahon’s appointment as secretary to the Regent, he claimed that ‘if he had changed his seat, he certainly had not changed his mind, for he would give the same conscientious vote now that he gave then’. He still voted for sinecure reform, 4 May. There was talk of his becoming a lord of the Admiralty, but nothing came of it.
Adams’s seat for Weymouth was no longer available to him in 1812 and he was left out of doors. He died 15 Nov. 1821.
