Brudenell’s father, a ministerialist and anti-Catholic, who was Member for Marlborough, 1797-1802, succeeded his uncle as 6th earl of Cardigan in 1811, when he took up residence at the family home, Deene Park, Northamptonshire. It was there, particularly in his hunting and militia pursuits, that Brudenell first displayed the twin traits of his character: the handsome countenance, courageous horsemanship and dashing heroics of a soldier, and the quarrelsome temperament of a petty martinet.
No evidence of parliamentary activity has been traced for the 1824 session. Early that year, having begun an affair with Mrs. Elizabeth Johnstone, he challenged her cousin Gilbert John Heathcote* to a duel in defence of his sister’s honour. Heathcote did not fire and Lady Derby observed that ‘after Gill had received Lord Brudenell’s shot for maltreating his sister, he ought to have said, "Now, my lord, I must beg you to receive my shot for your conduct to my cousin".’ Johnstone brought a case of crim. con. against Brudenell, who was ordered to pay £1,000 in compensation, but married her two years later, after she had obtained a divorce.
Brudenell voted against Catholic relief, 6 Mar., and the second reading of the corn bill, 2 Apr. 1827. He divided against repeal of the Test Acts, 26 Feb., and, having brought up a hostile petition from the archdeacon and clergy of Chichester, again against relief, 12 May 1828. He was in minorities against finding William Leadbeater guilty of lying to the committee on the East Retford disfranchisement bill, 7 Mar., and making provision for Canning’s family, 13 May, but was in the majority against reducing the salary of the lieutenant-general of the ordnance, 4 July 1828. Brudenell, who returned to Ireland in the autumn, was again considered as a possible mover or seconder of the address in January 1829.
Brudenell was again returned for Fowey at the ensuing general election, although there was some dispute over the payment of his expenses.
Fowey having been abolished, he was narrowly elected as a ‘strict Conservative’ for Northamptonshire North at the general election of 1832, despite being an unpopular candidate and ‘much cut in the head by a stone’ during rioting.
