Actual bodily harm - less serious injury, including cuts, bruising, chipped teeth, minor fractures.
Wounding - a separation of the skin.
Grievous bodily harm - really serious injury.
Serious provocation would, however, potentially be relevant when the authorities were applying the public interest test in deciding whether to prosecute.
If you were nevertheless prosecuted, provocation would be a mitigating factor that a court would consider when dealing with you.
If your moral code causes you to disagree with the law - well, that’s a matter for you, and a conversation for another thread. [ENDS]