Lords Commissioners of the Treasury concomitant, so much so that the Prime Minister's official residence, 10 Downing Street, is in fact the official residence of the First Lord of the Treasury, which title is named on the letter box. Salisbury, as a marquess of vast independent wealth, had no use of an official residence, instead living in his grander town house at 20 Arlington Street in St James's, and could instead bestow it as a perquisite to other ministers, along with the First Lordship itself. Other positions have been linked to the Prime Ministership as well. Continuously since 1968, when the position was created by
George Ponsonby (Junior Lord of the Treasury) being elevated to the peerage as 1st Baron Ponsonby of Imokilly, but a general election quickly followed when he was replaced in this seat by his younger brother Hon. Frederick Ponsonby. He subsequently served as for Cork County from 1806 to 1812; for Youghal in County Cork from 1826 to 1832; and was evidently also a member of the following Parliament. He lived at Woodbeding in Sussex. He married twice, having two sons (both of whom predeceased him) and a daughter. George Ponsonby (Junior Lord of the Treasury) George Ponsonby (1773 – 5 June 1863), styled The Honourable from 1806,