In early life Philipps was on good terms with his cousins, the Walpoles, whom he presented with a genealogical table showing their joint descent from Cadwalader. Perhaps because, as Horace Walpole hints, he was given no place, he turned to opposition, becoming ‘a very zealous and active Jacobite’
On the formation of the Broad-bottom Administration in December 1744 Philipps was made a lord of Trade. But, ‘resolved to give us an early specimen that he would be as troublesome a placeman as a patriot’, on 23 Jan. 1745 he supported an amendment delaying the supply for the Ordnance. Next month he again opposed the supply and spoke against the grant of two short months’ pay to the Hanoverians. On 20 Mar. he opposed a grant for the transport of the Dutch troops sent over during the invasion scare of 1744 and spoke against the Saxon subsidy.
Philipps did not stand in 1747, leaving Parliament ‘on the desperate situation of the Jacobite cause’.
