United Kingdom, Oct. 25 -- Charles Spencer hates it when people tell him where they were when his sister Princess Diana died.

The royal was killed following a car crash in the Pont de l'Alma tunnel, Paris, France, on August 31, 1997, aged 36.

Princess Diana's 61-year-old brother, the 9th Earl Spencer, said on the latest episode of broadcaster Gyles Brandreth's Rosebud podcast: "I try and be really busy on the 31st of August because it's just terribly sad, really.

"I tell you what I do find quite difficult, and this probably sounds ungracious, but occasionally, total strangers come up and feel they must tell me where they were when they heard that she died, sort of thing.

"And I'm sure that's helpful to them. It's not entirely helpful ...