I was pretty sure that was Judi on the horse, but I wasn't sure if you shot it, or if it was a selfie. I think the outtake would have done better, though. More action and I can see all of Judi's hair.
To be honest I would have chosen the outtake - it conveys far more 'motion' with the horse and Judi's hair flying in the wind adds to the movement beautifully.
I find the framing which lops off the top of the rider's head distracting, but the subject matter and colors are lovely. The horse looks like an arab, looks like Crabbet breeding, is it?
Like the lighting, like the way the horse is standing. The background is a reasonably pleasing blur. Don't like the way the riders head is cut off, and my eye is drawn upward to the rider. If this was a selfie, I'm sure it was difficult to frame up!
Goo depth of field on this to remove all elements from the background. I however are not a fan of the crop at the top, where you have cut the risers head off.......
With this subject, having the horse in full motion, the tail streaming behind and the Riders Red hair also streaming behind would have been a great look.
Another incredibly detailed - an unbelievable action shot with all technical and artistic areas covered exquisitely - simply brilliant. Congratulations on achieving a level of beauty, grace, power and style that is unmatched.