Gather any group of night hunters together and ask them what the perfect calibre is for foxing and you’ll get a variety of answers. This will be especially true if they come from parts of the country with different terrain.
In my part of the world, mid-Devon, the majority of shots are taken at less than 200 yards. This is simply because most of the ground is shaped so that you can’t see very far. Coupled with this we often have stands of trees separating blocks of land, making it difficult to reach out any further. Consequently, we have little need for anything bigger than a .22 centrefire.