Mystery nest

[Rich]

I managed to get in the wood the other day for the first time in ages, I was collecting some small diameter firewood I had leant up against an oak tree in the summer. I found this nest inside it, sorry it's appaulingly poorly focused. Can anyone suggest what it might be? The droppings were 4 or 5mm long, the nest is mostly moss and bits of grass and woodchip.

[Rich]

Thanks for the photos, seem feasible! The pellets seem to be the right size and the nests are very similar.
Rich

[Andy M]

This is a really good book for identifying not only tracks but also scat (poo to you and me)
http://www.amazon.co.uk/Animal-Tracks-S ... 0199299978

Andy M

[Rich]

Thanks Andy,
The pellets look pretty similar except the ones in my photos are smoother than the more ragged ones in in ocp's photo, maybe a variation in diet?