Permabanned
scorza has had it explained multiple times that it's highly unlikely an individual would be prosecuted for self-defence and in the cases where they are that they've gone so far beyond what might be considered reasonable that they and reasonable are no longer within hailing distance of each other. However scorza appears to want that the police should take a quick look at the crime scene and make a snap decision prima facie that the evidence means the homeowner shouldn't be arrested while the incident is investigated.
It's unfortunate that the homeowner sometimes has to be arrested while the investigation takes place but it protects their rights as well as helping to ensure that the investigation can proceed properly.
//edit and while the phrasing "reasonable force" may appear to be vague (and indeed is deliberately so) that doesn't imply there is not mountains of case law to help interpret it in a fair and consistent way. Mistakes will occasionally be made, of that I have no doubt, but that is the price of having humans involved in the system as we're not perfect.
I was never arrested when armed burglars entered our home. My only regret is that I should have killed them instead of using reasonable force, but at least they are being sentenced in December and that should be a nice Chrimbo present for them and their family.