Barclay, who according to family tradition had had a youthful spat with his cousin Elizabeth Gurney (later Elizabeth Fry, the philanthropist and prison reformer) after she draped herself in a French tricolour, had abandoned the Quaker faith of his ancestors in order to join the militia and taken ‘a prominent part’ in the anti-slavery campaign. By 1812 he was effectively running the family brewing business of Barclay and Perkins and Company in Southwark, where he was returned at a by-election in 1815.
At the 1826 general election he was returned unopposed for Dundalk by the staunchly Protestant Lord Roden, from whom he apparently purchased the seat.
In February 1829 Planta, the patronage secretary, predicted that Barclay would vote ‘with government’ for their concession of Catholic emancipation, and he duly supported the bill’s third reading, 30 Mar. On 7 Apr. he suggested that opening Birdcage Walk to the public would be a cost-effective metropolitan improvement. He presented petitions from the Phoenix Gas Light and Coke Company of Bankside, Southwark against an innovation in gas apparatus, 10 Apr., and the Lambeth improvement bill, 15 May. He concurred with calls for the postponement of the London Bridge bill, 6 May, when he contended that discussion of the Orphans’ Fund should be brought before a select committee. He divided against allowing Daniel O’Connell to take his seat unhindered, 18 May 1829. He voted with ministers on the address, 4 Feb. 1830, and was curiously listed as one of ‘28 opposition Members’ in the majority, but thereafter his voting record showed no consistent pattern.
In March 1828 Thomas Creevey* had recorded hearing that as a result of the removal of the duty on gin, the output of Barclay’s firm, which was ‘by far the greatest brewer of ale and beer in England’ in 1826, had fallen by almost half.
At the 1830 dissolution Barclay retired from Dundalk. There is no evidence that he sought election elsewhere. Seconding the Tory Hylton Jolliffe* in the Surrey contest, he denounced ‘wild fantasies of reform’ and urged support for the government in the aftermath of the July revolution in France. At a by-election in Southwark that November he used his interest against his brewing rival Charles Calvert*, who complained of his ‘vindictive hostility’.
Barclay was returned as a Conservative for West Surrey at the 1835 general election, when he recalled his hostility to the Grey ministry’s reform bill but support for the disfranchisement of individual corrupt boroughs and measures of economy.
