Identificaciones de dvanwinkel

I was hoping this skink was native but zooming in on my photo, I think the head scale means it's a plague skink?
I have plague ones in my garden, unfortunately, but this one was some distance away in a firewood pile, inside a gap between the bark and wood of a log, found when relocating the wood pile
I've since found more of them hiding in the wood pile. No eggs at this stage