CB died relatively young by prime minsterial standards. Despite having been a smoker, Margaret Thatcher lived to the age of 87. Her arch-rival and predecessor as Conservative leader, Ted Heath, reached 89. But Heath was not a record-breaker. The longest lived British prime minister to date has been James Callaghan who lived to 92 years and 364 days – just one day short of 93. Harold Macmillan and Alec Douglas-Home both made it to 92 and Churchill lived to 90.
Recent research has shown that politicians do indeed live longer than those in other professions, on average surviving to 83.0, compared to academics who have an average lifespan of 81.7 years and performing artists who only average 77.2.