Our neighbors used to keep livestock.
Our friendly neighborhood farmer (next door) used to keep dairy cattle. The cattle would sometimes escape and frighten passing motorists.
But I've never seen armed police (with chopper) used to bring them back to pasture (permanently, in this case). Usually it just required some loud shouting and perhaps a stick
So that must of been one bad-ass Bessie. Or is Northumbria the center of an agricultural war zone within the UK?