As Lorna Ireland, 36, and her son Shinobi Irons, 12, each filled their individual jars with bands of coloured salt - representing memories of the youngster's grandmother who died three years ago and godmother who died in 2015 - the future king spoke about his feelings.

Miss Ireland said: "He told my son that when his mum died he was 15 at the time and he was very angry and found it very difficult to talk about it.

"So it was very important that Shinobi talked to somebody about how he was feeling even now years on."

She said about the admission: "It was very personal and it was very special."

The Duke was a teenager and his brother Prince Harry was just 12 when their mother Diana was killed in a car crash in Paris on August 31 1997.

In recent years the royal siblings have begun to talk about their feelings surrounding their loss with Harry saying last summer in an interview he now regrets not opening up sooner about how his mother's death affected him.