‘Discount’ Latouche, a partner in the family bank, was returned for Harristown by his father during the last Irish parliament and like him opposed the Union.
In his maiden speech, 2 Mar. 1803, Latouche opposed the window tax, at his constituents’ behest. On 4 Mar. he voted against the government on the Prince of Wales’s finances. In February 1804 with his brother Robert he was one of the Prince’s Irish recruits ‘captivated last year by the Prince of Wales’s dinners’,
Latouche supported the Grenville ministry, but lost his seat at the election of 1806. In 1807 he was returned for county Leitrim on the family interest with Lord Leitrim’s support and voted frequently with opposition for the rest of his life. He spoke against the Irish distilleries regulation bill, 24 May 1809, but apparently on no other subject after 1807. He voted for Brand’s motion for parliamentary reform, 21 May 1810, after voting with the radical minority critical of Curwen’s bill, 12 June 1809. He continued to vote for Catholic relief until 1812, after which he appears to have been absent or paired when the question came on until 1819. In fact from 1813 to 1817 there is no evidence of his attending regularly. From March 1818 until his death, 30 Jan. 1820, he appeared steadily in the opposition lobby.
