On top of the northern arc of the henge looking east.
Image credit: ryaner
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That's a very impressive earthwork, no obvious inner ditch in that shot? Beautiful light for your photos too.
No inner ditch visible anywhere that we could see tsc. So yes, don't discount the possibility that it's not a henge, though that's my preference (which is of no archaeological value of course).
You've no doubt visited more sites than a good few archaeos, so don't discount your opinion. It's a fine earthwork either way!