Fitzroy’s father, a brother of the 4th duke of Grafton, on whose interest he had represented Bury St. Edmunds, was a general in the army and commander of the Ipswich garrison. His mother had died when he was a year old and his stepmother (d. 1810), the mother of his half-brothers and sister, was a sister of the Liverpool ministry’s foreign secretary Lord Castlereagh*.
Fitzroy occupied Sholebrooke Lodge, Northamptonshire, vacant through the posting to Armagh of his cousin Lord Charles Fitzroy*, and at the general election of 1831 he contested Bury St. Edmunds, where his cousin Lord Euston had retired after voting against the ministerial reform bill. Unlike his half-brother Robert, who failed to come in for Ipswich, he declared firmly for the bill, despite its threat to Bury St. Edmunds’s second seat, but made it clear that he would ‘not pledge to vote for every clause in the committee’.
It had regularly been reported locally that Fitzroy was ‘too ill’ to attend reform meetings and dinners in Bury St. Edmunds, and he made way for Lord Charles Fitzroy at the 1832 dissolution.
