I think she wanted the spencer tiara discovered no way could she get that and then perused the Queen’s tiaras saw the stunning Vladimir Emerald Tiara (with the Cambridge emeralds lol) and insisted on that. HM laughed and pulled an obscure never used in 40 years bandeau from the back of the vault and said “my choice not yours”. When I saw on the wedding day that bandeau I knew Megsy had been shown her place in the hierarchy of the BRF. The claim about provenance was an excuse.