Since the recent wedding of the Hon Antalya Nall Cain when she wore the Brocket tiara, a number of sites are asserting that the tiara was also worn by her grandmother and aunt for their weddings.
Who has copied from whom is difficult to determine.
Hopefully some clarification will ensure that some sloppy research will be rectified before this assertion becomes entrenched.
The grandmother of Antalya Nall Cain was Elizabeth Mary Stallard, who married Ronald Charles Manus Nall Cain in December 1950. Ronald predeceased his father, the 2nd Baron.
Below is a photo of their wedding day. The bride is definitely not wearing the Brocket tiara.
Detail
The Hon Antalya's great grandmother, whom we have seen wearing the Brocket tiara, didn't wear it for her wedding day either. Below is a photo of Angela Pennyman at her wedding in November 1927.
The only other Nall Cain lady I have found an image of wearing the tiara on her wedding day was the Hon Elizabeth Nall Cain, daughter of the 2nd Baron -- which makes her a great aunt, not an aunt of the Hon Antalya Nall Cain.
If any one can show me that I am wrong, I will happily acknowledge any mistake/s.