Most people avoid violence. This is not weak, its sensible.
The pressure of city living has led to a dramatic increase in violent crime. Minimize the risks to yourself. Then its time to decide how you will defend yourself, if the worst happens.
Understanding a few points of law might help you to avoid trouble. Most of us never have contact with the police or courts. Some of us may, if only by mistake.
You may only do what is˜reasonably necessary to defend yourself from attack. Each case is different so what is reasonably necessary will vary. British law actually states that you can use such force as is reasonable in the circumstances in the prevention of crime. If you genuinely believe your life is at stake, reasonable force may be quite extreme, even involving a weapon in some circumstances.
Basically, the action you take to defend yourself or your property must not be excessive. If the law thinks you overdid it, YOU may be liable for prosecution.
The law expects the victim to run away or withdraw when threatened by violence, but this is not always possible.