Rose was named after his godfather William Pitt†, under whom his grandfather George Rose† had served as a loyal lieutenant and prospered as a place hunter for himself and his family.
At the 1826 general election Rose was returned unopposed for Christchurch with his father, whose Tory line he followed in the House.
At the 1832 dissolution Rose retired from Christchurch, which had been partially disfranchised. He apparently bided his time until the general election of 1841, when he was narrowly defeated as a Conservative at nearby Poole. On 25 Aug. he informed Peel, the new premier, of his impending petition against the return and requested a household appointment for himself or his wife, noting that his family had ‘for three generations steadily and invariably supported Conservative governments’ and that though the expense of his defeat had been ‘great’, the ‘salary is not a consideration, but an employment in or near London is one’.
Rose died v.p. and intestate at Winchester in September 1851.
