Princess Diana's favourite tiara: Cambridge Lover's Knot tiara

Princess Diana wore the diamond tiara with pearl drops, designed in 1914, many times

Princess Diana wore the tiara with pearl encrusted dress and bolero by Catherine Walker for a tour of Hong Kong in 1989

On a visit to Canada in June 1983, Princess Diana teamed the tiara with a heart-shaped diamond necklace which Prince Charles gave her when Prince William was born and the family order of Queen Elizabeth pin.

Princess Diana packed the tiara for a farewell banquet in Auckland, New Zealand in 1983, which she wore with a fairy tale style dress by Gina Fratina



Princess Diana wore the tiara for a state opening of Parliament with pearl drop earrings and a pearl and diamond choker

Princess Diana wore the Cambridge Lover's Knot tiara at the British Embassy in Washington in 1985

The late Princess of Wales was snapped in the eye-catching headpiece after and audience with King Fahd bin Abdul Aziz al Saud on a visit to Riyadh, Saudi Arabia, in 1986

Princess Diana teamed her tiara with her one-shoulder gown to attend a state banquet given by President Collor of Brazil at the Itamaraty Palace, Brasilia, in 1991

A Scottish artist, Leonard Boden, presented this oil painting of Her Majesty in 1957 to the Royal MilitaryAcademy Sandhurst. It is the first portrait which shows her wearing the mantle and insignia of the Order of Bath and she chose the Cambridge Lover's Knot tiara, with matching pearl drop earrings

The Cambridge Lover's Knot Tiara was fashioned from Queen Mary's jewels by Garrard in 1914

Queen Mary, the Queen's grandmother, wore the original version of the Cambridge Lover's Knot tiara

Princess Diana wore The Cambridge Lover's Knot Tiara at the La Scala Opera House to see a performance of Turandot on an official tour of Italy in April, 1985



Diana wore the Cambridge Lover's Knot tiara at the British Embassy in Washington in 1985

(L) Princess Diana and Sarah, Duchess of York were snapped chatting at Claridges Hotel in March 1987. The Princess of Wales chose a pearl choker and pearl earrings to go with the headpiece and white beaded gown

Princess Margaret's favourite Lotus Flower headpiece made from Queen Mother's jewels

Princess Margaret wore the Lotus Flower Tiara up until 1990
 

Princess Margaret wears the Lotus Flower Tiara on the top of her head, much as Kate does, at an official reception at the King's House, Jamaica, in 1962

The wedding of Viscount Linley and Serena Stanhope, where the bride wears the Lotus Flower tiara around an elaborate headpiece in 1993

The diamond necklace belonging to the Queen's grandmother, Queen Mary was turned into the bracelet worn by the Duchess of Cambridge during the state banquet at Buckingham Palace on October 20, 2015.
 

 Portrait of Duchess of York in 1928 wearing the Lotus Flower tiara after it was made by Garrard from a Greek-style necklace given to her by her husband the future George VI.  The Queen Mother, brought some 1920s flair to the piece by wearing it across her forehead in a bandeau style. But she soon packed it away until it emerged after she gave it to her younger daughter in 1959.

Princess Margaret sported the Lotus Flower Tiara in 1960 at the Thailand embassy.

Princess Margaret is driven from Kensington Palace