http://www.aveburytours.co.uk/A1nomoly.jpg
After listening to a Photo Forum.

The photo on the left has a bright Leg on the tripod.
I used onboard flash where and when necessary on auto as I took a 360 pano.
If flash went off on this frame then it is a fast shutter speed and a lower F stop hence a slightly blurry image
The next image is sharper and there is a delay at least 5 seconds while the chap walks 5 steps (time for camera recharging its capacitor?)
More light seen in the 2nd photo so no flash needed and so no flare.

Sounds good to me