Weasel

Widespread throughout Britain, weasels are our smallest and probably most numerous carnivores. However, they are absent from Ireland and most off-shore islands. They are found in a wide range of habitats which include urban areas, lowland pasture, woodland, marshes and moors. Weasels are less common where their prey are scarce, such as at higher altitudes and in dense woodland with sparse ground cover. (https://www.mammal.org.uk/species-hub/full-species-hub/discover-mammals/species-weasel/)