During the War of Saint-Sardos rumours circulated that Pessagno was planning a naval attack on England with Genoese and Portuguese ships. After the fall of Queen Isabella and Roger Mortimer in October 1330, Pessagno returned to England and was with the royal court at Christmas. He was recognized with the rank of banneret. Through the intervention of William Montagu, Earl of Salisbury, he secured repayment of an outstanding £8,141. Perhaps he had assisted Montagu in overthrowing Isabella and Mortimer.