He was instrumental in the enfranchisement of Sheffield, petitioning Parliament in 1817 and 1822, and creating a pamphlet stating the case for Sheffield in 1830. When the Sheffield constituency was finally created as a Parliamentary borough in 1832 he was elected alongside James Silk Buckingham as its first MPs. He died at 71 Onslow Square, London, on 5 September 1881, and was buried at Healaugh, near Tadcaster, North Yorkshire, on 9 September, having married, on 8 February 1853, Eliza Charlotte, second daughter of George Vernon of Clontarf Castle, Dublin, Ireland.
11th United Kingdom Parliament. 12th United Kingdom Parliament. 13th United Kingdom Parliament.
14th United Kingdom Parliament.
15th United Kingdom Parliament]
He served as Member of Parliament for Sheffield until 1852, becoming Lord of the Treasury (1839–1840), First Secretary of the Admiralty, joint Secretary to the Treasury (1846–1849), and a Member of the Privy council (1853).