The tiara in the first image below is commonly attributed to have belonged to Maria Fitzherbert. While looking for something completely different, I came across the second photo dated 2006 of the tiara (or one of a very similar design) captioned "Sir John and Samantha Leslie at the Castle Leslie Ball".
Are there any further details on the history of this tiara such as when it was sold, its subsequent ownership, and whether or not it is currently owned by the Leslie family?