Buckingham Palace has made it clear that this tiara and the scroll tiara the duchess wore on her weddingday were both loans from the Queen. It may very well be that the Duchess has little say in it. HM might feel these two were apropriate for the Duchess due to their link with her own mother. The lover's knot is said to have been a gift to the Princess of Wales. Diana stopped being that when she divorced so at that point the tiara either went to her husband or more like the Queen. If it went to Charles it would be for Camilla who understandably does not wear it. If it went back to the queen she may keep it for a while longer or leave for the moment the Duchess of Cambridge becomes HRH the Princess of Wales.
--Previous Message-- : It was not thát long ago the diadem has been : seen. The Hon. Serena Alleyne Stanhope wore : it on her wedding day: : : :