Sotheron, a Yorkshireman and naval officer, had apparently joined Brooks’s Club in 1808, but represented Nottinghamshire on the duke of Newcastle’s interest, as an inactive supporter of Lord Liverpool’s administration, from 1814.
He voted in defence of ministers’ conduct towards Queen Caroline, 6 Feb. 1821. He divided against barring civil officers of the ordnance from voting in parliamentary elections, 12 Apr., and parliamentary reform, 9 May. He voted against the forgery punishment mitigation bill, 23 May, and Hume’s proposal for economy and retrenchment, 27 June 1821. He divided against more extensive tax reductions to relieve distress, 11, 21 Feb., and spoke against reducing the number of junior lords of the admiralty, 1 Mar., but sided with opposition to abolish one of the joint-postmasterships, 2 May. He opposed dividing the constituency of Yorkshire, 7 June, and voted against inquiry into Irish tithes, 19 June, and repeal of the salt tax, 28 June 1822. He presented petitions from Nottingham and Southwell churchmen against the Marriage Act, 10, 14 Feb., and an anti-Catholic one from Mansfield, 15 Apr. 1823.
During the following February and March he presented numerous Nottinghamshire petitions calling for agricultural protection, and he duly voted against the corn bill, 2 Apr. 1827.
Sotheron, who became a full admiral that year, was again returned unopposed at the general election of 1830, after Denison was persuaded, at the prompting of him and others, to avoid provoking a bitter contest.
Sotheron, who had been warned that he would face a challenge in his county and had succumbed to a bout of illness, insisted on retiring at the ensuing dissolution, issuing a farewell address, 22 Apr. 1831. Becher, who was himself a reformer, blamed his sudden unpopularity on the manner and timing of his change of opinions on reform, but would have undertaken to obtain his re-election, if only after a damagingly expensive contest. It was alleged that he had tipped off his replacement, Denison, about the vacant seat before his withdrawal was announced, but Becher vindicated his entire political conduct at the county election, when he was generally praised for his long service.
