Phillipson succeeded his father as manager of the Post Office interest at Harwich. For years he had been trying to build up his own interest in the borough at the expense of that of the Treasury. He received no encouragement from Henry Pelham but after 1754 seems to have placed greater hopes in the more pliable Duke of Newcastle. In this, however, he was disappointed; Newcastle, though he returned Phillipson for Harwich at the general election of 1754, stood by the Treasury agents in their opposition to Phillipson’s encroachment.1Namier, Structure, 358-67.
Phillipson died 27 Nov. 1756.