Buller stood for Exeter, which lay about eight miles from Downes, with the support of the corporation in 1790 and easily topped the poll, though at a reputed cost of £16,000.
Buller did not stand for re-election at Exeter in 1796, having decided, so he claimed, to retire into ‘private life’; but he allowed himself to be nominated for the county, only to shy away from a contest.
He seems to have given general support to Addington’s administration, although it was almost certainly he of the four Bullers in the House who voted with the opposition minority on the renewal of war, 24 May 1803. Placed under ‘Addington’ in the ministerial list of May 1804, he voted against Pitt’s additional force bill in June,
His few recorded votes in the 1807 Parliament were all against government, namely on the mutiny bill, 14 Mar. 1808, the Scheldt expedition, 23 Feb. and 5 Mar. (as a result of which the Whigs reckoned him ‘hopeful’) and again 30 Mar. 1810, the Regency proposals, 1 and 21 Jan. 1811, and sinecures, 24 Feb. and 14 Apr. 1812. Ministers did not list him among their supporters after the 1812 general election and he continued, when present, to act independently. He presented and endorsed a petition from Exeter against alteration of the Corn Laws, 6 Mar., and voted against the corn bill, 27 Feb., 3 and 10 Mar. 1815. He divided against government on the renewal of war, 28 Apr. and 25 May, the civil list, 8 May 1815, and the army estimates, 6 Mar. 1816, but defied widespread popular feeling in Exeter by voting for continuance of the property tax, 18 Mar.
Buller was described in 1810 as ‘a man of sense and prudence’ who had ‘always made the best of his property, having a very large family, though a most fair and liberal landlord’.
