In isolated rural areas it may take two hours for a police officer to respond to a 999 call.
The only way to make sure that a burglar is not going to be a danger in these circumstances is to use lethal force, even if this means shooting them, using multiple blows with a blunt instrument, or stabbing them many times.
No-one should be in fear of prosecution in such circumstances.
The current "reasonable force" is just not applicable in the circumstance of a burglar in your home.