Which vole ? update with video footage

Came across this cute critter when I was raking up leaves and tidying the far corner stumpery so grabbed a tray of food and the camera  !       I've seen wood mice but I wasn't convinced this was one and wondered i it could be a field or bank vole.    I'm pretty sure it's not a baby rat  ........ hopefully !        Any help gratefully received. 

It's ears looked too small for wood mouse.  

rounded shape like wood mouse ....   perhaps baby wood mouse !