No, you use reasonable force -
It’s useful to know the boundaries of what you can and can’t do, to help give you the confidence to make the right decision in the moment.
peoplesafe.co.uk
There have been prominent cases in the UK where reasonable force was used correctly and incorrectly. One where a pensioner struggled with a burglar who brandished a screwdriver. A fight took place and the intruder got stabbed by the screwdriver, fled the scene and died. It was proven reasonable. A farmer shot a burglar trying to get out of the property and died, and put lead lead shot into the backside of the other burglar running away outside. The force he used in the circumstances was not deemed reasonable, plus, he didn't have a valid shot gun certificate.
The link clearly explains self defence in the UK. I know you won't read it because it'll update your knowledge on a different country. By and large, most Americans are ignorant of world affairs and other countries, but convinced they're the best at everything.
Sounds like in America, you shoot at will for the most irrelevant incidents and then ask questions. And it's deemed justifiable, makes you free, and whoop whoop slap slap. Unfortunately, someone in a safe gun culture looking in on America, think you're off your bloody rockers.