Ultimately it will only end when the military is called in and can brandish actual firearms.
My ex was career military. I don't know about the UK, but he always said "You really don't want to bring in the military (for stuff like this). Police are trained to wound and bring them in alive. We are trained to shoot to kill."
My ex was career military. I don't know about the UK, but he always said "You really don't want to bring in the military (for stuff like this). Police are trained to wound and bring them in alive. We are trained to shoot to kill."