Bainbridge and his brother Henry were partners in the London banking house of Puget, Bainbridges and Company of 12 St. Paul’s Churchyard, which had grown out of a mercantile firm in Warwick Lane established by their father around 1780. Thomas Bainbridge, a member of the organizing committee behind the London merchants’ loyal declaration of 1795, also had Irish connections, through his firm’s links to the Dublin bankers Latouche and Company, and through ownership of a landed estate at Frankfield, county Cork, which passed to his third son John.
The Wellington ministry optimistically listed Bainbridge among their ‘friends’, but he voted against them in the crucial division on the civil list, 15 Nov. 1830. He presented a Taunton petition for parliamentary reform, 28 Feb., voted for the second reading of the Grey ministry’s bill, 22 Mar., and against Gascoyne’s wrecking amendment, 19 Apr., and presented a petition from the inhabitants of Taunton St. James for their inclusion in the borough, 20 Apr. 1831. At the ensuing general election his support for reform ensured his unopposed returned for Taunton, where he praised both the conduct of the king, who had ‘nobly helped us to throw off the yoke which the boroughmongers would impose on us’, and the ‘patriotic and independent spirit’ displayed by ‘all classes’ of voters.
Bainbridge was returned unopposed for Taunton at the general election of 1832 and sat as a ‘reformer ... in favour of the ballot’ until his retirement in 1842.
