Very round.I assume it is a skull but have no idea what it is from.
No interactions present.
Yes it's a bird cranium. The distance across the frontal bones between the orbits seems a little narrow to be blackbird or thrush. May be a starling, but you would really need to see it with the bill to be sure.
Lat/Lng: 54.07768, -0.84853
OS grid ref: SE754652