"He also regretted members of the Royal Family giving personal interviews.
"He felt [that] no good ever comes of it. I said to him, 'But you were the first member of the Royal Family to give an interview on television in the 1950s for the BBC and later for things like Wogan’.
"But he said, 'That was about what I did, my work, never about me as a person’.”
The broadcaster and writer continued: "He reminded me and said, 'You know, in 1953, you won't remember this, but after the Coronation, the Queen and I went to Australia on a tour. Millions of people came out and cheered the Queen, millions.
"‘And if the Queen had thought it was about her, it would have been corrosive. But the Queen is the same with one person or a million people. Once you begin to think it's about you, you are in trouble. Don't give interviews about yourself. It's about other people’.
“And that was his philosophy,” Gyles finished.
Source : https://www.express.co.uk/celebrity-news/1450196/prince-philip-meghan-markle-prince-harry-distressed-oprah-winfrey-lady-colin-campbell-news178