In the meantime, Queen Elizabeth still needed a ruby tiara of her own, in particular, to wear with the host of ruby jewellery she owned.

And so Her Majesty decided to design one herself and this led to one of the most modern tiaras in her possession.

Sophie explained: “The Burmese Ruby Tiara was created in 1973 by the House of Garrard. 

“Estimated at £5 million, the tiara is one of the more controversial designs within the Queen’s collection.