Kate Middleton is asked to learn from Princess Diana's public conduct, says expert.
Royal commentator Pandora Forsyth believes the future Queen Consort has opted for a reserve approach in her royal appearances.
Speaking on the Royal Round Up, Mr Palmer said: “The Royal Family is still shaped by Diana really.
“We see every day, I think, how it changed as a result of her and we see it in the legacy of her two sons and the Diana Award, the charity that was set up.”
Ms Forsyth added: “Obviously all their charity work as well.”
Mr Palmer agreed: “I suppose it changed our idea of what a princess should be and do.”
The royal correspondent added: “We do see that reflected, to some extent, in the activities of the Duchess of Cambridge.
“There were things that were deemed too close to the bone to members of the Royal Family to do before Diana.
“She did them, for example the landmines campaign, and upset quite a few politicians.
“I don’t think Kate has done anything quite as controversial as that," says the expert.
Schofield previously admitted his wife had been 'very angry' after he confessed to cheating on her
Meghan Markle and Prince Harry's relationship might have begun because of their different 'societies'
Prince William's wife Kate Middleton revealed her only daughter Princess Charlotte brightened her morning with a song
Geri Halliwell-Horner also opens up about her husband’s response about this new book
Princess Eugenie shouts out her elder sister Princess Beatrice’s podcast debut
The former Olympic athlete shared 22 years of marriage with the Kardashians' momager