The greys are running off the smaller red squirrel, I think I saw somewhere else in the UK air gun press.
Lots of blokes are shooting them, but one must have 'permissions' from land owners to shoot them on private property. I don't think there is such a thing as open, public land over there, is there? Here we call open public lands, Crown Land, but there, Crown Land has a more literal meaning.

Greys are VERY good eating, Mehulamder.