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The piece is likely one of the smaller diadems within the royal assortment, with its elegant design and its diamond-encrusted lotus motifs.

Miranda continued: “It is customary for the royals to have pieces of jewellery refashioned into something new, it’s a bit like a royal form of upcycling.”

Princess Margaret obtained the tiara in 1959 and it grew to become one of many “signature pieces” in her assortment.

“Following her dying, there was a lot hypothesis as to what had occurred to the piece till we noticed Kate wanting lovely carrying it in 2013.

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