Happy to help! Getty Images had some others, so I am sure there are many photos from that day. It was a little tricky finding the right search term, which led me to the book, and then the photo.
A little late responding. (Busy here) But thanks for all your research! Queen Elizabeth is so much more than the gentle appearing woman with the matching hat and coat, with gloves and that handbag that we always see. She is unique in many ways and I love those old pictures of her where you see the real person. Yes — Royalty is just a word of old, and her position is a revered formality, but behind it all is someone who has taken on a life with two sides, and she has done both well. I just love seeing her when she is not on the throne. Thanks again.