An egg, probably eaten by a stoat. About the size of a large chicken egg.
No interactions present.
All geese (and duck) eggs are unmarked. This egg looks to me more like a coots egg than anything else I can think of.
P.S. A coot egg is a little bigger than 50mm (about the size of a small hen's egg)
Lat/Lng: 53.7719, -2.6332
OS grid ref: SD583308