In the photo of Jadis' and another characters' stunt doubles riding Strawberry, is it possible that the person in front is not Digory, as has been assumed, but instead Frank? As commenter Matthaias mentioned on that post, the heights don't seem right for that to be Digory and Jadis. Like I mentioned in my comment there, maybe Frank’s cab was destroyed, and he tried to ride Strawberry to safety, but Jadis jumped up behind him, leading to this scene? One possible argument against that theory, though, is that there's no evidence of a broken harness on Strawberry.
@kj7rrv Hmm. I will take another good look later, to compare the photos.
There, shining in the sunrise, larger than they had seen him before, shaking his mane (for it had apparently grown again) stood Aslan himself.
"...when a willing victim who had committed no treachery was killed in a traitor's stead, the Table would crack and Death itself would start working backwards."
Id say that was unlikely.
For one, even though the design of the stunt double's vest is slightly different to Digory's, the entire ensemble is basically identical. It would be super weird to me if Frank was wearing an identical light green shirts, brown shorts and vest to Digory.
Secondly, although the stunt double is obviously not a child, his height would suggest he is doubling for one. In fact, I'd say his costume also looks like that of a child as well
I'd personally just write the costume discrepancies down to needing the stunt double to have more flexibility and protection, and with close-up detail not being all that important.