Hi wildlife fans

How is everyone?
Okies...last week i caught my rather over excitable dog sniffing around a patch of my lawn near the edge of some decking and next to my kitchen.
On further inspection, i found a hole! It's about 50mm accross and sort of goes straight down, and then curves off about 100mm into the actual hole itself.
Now i didnt know if there was anything actually living in there, but i put some soil over the hole in the hope of seeing what happened.
Well, i went out yesterday to have a nose at it, and it appears the tunnel has been re-dug and the hole is back!!! I popped a couple of peanuts and some sunflower seeds at the edge of the hole, again, a couple of hours after i left them, they had gone! So i know there is something living in there.
Not sure what though! I've taken a photo, although i cant upload it at the moment

there are no obvious runs coming out from it, and no signs of droppings or anything. I have smoothed the soil at the entrance of the hole this morning with the hope that whatever is in there will leave a clue in the form of some handy footprints.
So...my question is...WHAT IS LIVING IN THERE?

I dont think its a rat, im thinking vole or mouse. As i said, the fact the soil is patted down around the hole is my doing to get some footprints, there wasn't a real mound where the soil had been put my the creature.
Here is a photo of it!
