I believe the tiara was made up of 3 brooches and was a wedding present to Margaret from Snowdon. As Frances A-J would not have a tiara it was understandable her half sister would lend her one
--Previous Message-- : Earl Snowdon is alive, therefore Sarah has not : inherited the tiara from him. He may have : given her the flowered tiara as a wedding : gift, but since her half sister also wore : it, it could have been a loan. :