Lying on the floor, some half buried in the ground.Very close to a river.
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I can't see clearly from photo, but if wood mouse there will be tooth marks on surface and inner edge of hole, if bank vole there will be no gnaw marks on the surface, only on inner edge.Hope that helps.
Dear Mrs Smith, we can't find any marks on the surface so we think its a vole. Thanks for helping.
This hazelnut has been nibbled by a bank vole. They are much neater nibblers than woodmouse who leave a ragged outer edge to the hole. Squirrel break the nut in two. Dormouse leave a neat little hole, usually through the nut's scar.
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Thank you Graham, our guess was right! We weren't sure though so thanks for confirming.
Lat/Lng: 53.340482679688, -2.2025012969971
OS grid ref: SJ866826