At the general election of 1820 Smith got his father Lord Carrington’s ‘reluctant assent’ to his offering for Buckinghamshire, where their estate at Wycombe Abbey gave them an interest, in the room of the retiring sitting Member. He stressed his ‘independent and disinterested conduct’ as Member for the family borough in the 1818 Parliament (where he had in fact voted regularly with the Whig opposition to the Liverpool ministry) and came in unopposed with the sitting Tory Lord Temple, the son of the 2nd marquess of Buckingham. He subsequently established himself as the representative of Buckinghamshire Dissent.
He was in the minority of magistrates who opposed Buckingham’s veto of placing official advertisements in the oppositionist Buckinghamshire Chronicle at the October 1821 sessions. A year later he promoted a campaign for inquiry into county expenditure.
At the general election that summer he was returned unopposed for the county, promising to act on ‘independent principles’ and expressing his ‘detestation of slavery’. He was physically threatened by a mob assembled by his anti-Catholic Tory colleague.
Smith continued to sit for Chipping Wycombe until he succeeded his father to the peerage in 1838. He was one of the Liberal peers who opposed repeal of the corn laws in 1846. Five years later his county neighbour Benjamin Disraeli† (whom he had beaten at Wycombe in 1832 and 1835) described him as looking ‘bored to death [and] absolutely disgusted by the necessity of living on his lands’.
