and you can according to lawbollox if anybody was found in my house uninvited regardless of risk levels I would kill him. I lived in handsworth b'ham where there is no English people and I strategically placed weapons around my flat and I told my housing officer that hoodrats where eyeing my place up and I wanted a move.
It is still lawful to act in reasonable self-defence, even if the intruder dies as a result. However, prosecution could result from "very excessive and gratuitous force", such as attacking someone who is unconscious.