Princess Diana was the “first person to rattle the cage of the monarchy”, claims the Queen’ Elizabeth II's biographer. The late Princess of Wales - who died in August 1997 in a car crash in Paris aged 36 alongside her boyfriend Dodi Al-Fayed - was the only person “in living memory” to question how the institution runs and operates but didn’t do it “intentionally” with her AIDS and landmine activism and the way she captured the national imagination. Ingrid Seward told PEOPLE magazine: "Diana was the first person to rattle the cage of the monarchy within living memory.