If a Brit actually accosted a felon while in the commission of a crime, even while in their home, the homeowner or tenant will always face stiffer penalties for assault than the home invader will for every act that promulgated the situation.
And if the Brit serf was stupid enough to use something like this, an item actually MEANT to act as a weapon in that fiasco, they'll very likely get decades of prison time...on top of compensating the robber for loss of wages, consortium, pain and suffering, ect.
This, BTW, is about the only reason I won't live in a Crown territory such as British Columbia.