So far I have only seen a very small version of the picture above on the internet, as well as the British Pathe still posted on this site.
Seeing it now in detail makes it so much more appealing to me, honestly. I am so impressed by it and I'd love to see it on one of the royal ladies again. The aigrette reminds me of Princess Charléne hair decoration.
Interesting that the author had the permission of QEQM herself for printing the picture ...