Paul Burrell Appears On Lorraine To Discuss How King Charles' Cancer Diagnosis Is Putting 'Massive Pressure' On Prince William. Paul Burrell is a former servant of the British Royal Household and latterly butler to Diana, Princess of Wales.The type of cancer has not been revealed - it is not prostate cancer, but was discovered during his recent treatment for an enlarged prostate.The King began "regular treatments" on Monday and will postpone public duties during it, the Palace said.