KembaraXtra-Case Law-Williams (Gladstone) (1984) CA

II. Factual Summary

D's Observation: D saw a man assaulting a youth.
Youth's Plea: The youth was calling for help.
Reality of the Situation: The man was lawfully arresting the youth.
Man's Deception: The man falsely claimed to be a police officer.
D's Actions:
- D asked for a warrant card.
- D did not obtain a warrant card.
- D struggled with and punched the man.

III. Legal Issue

Whether D's actions constituted assault occasioning bodily harm given his belief about the situation.

IV. Holding / Outcome

V. Rationale / Key Legal Principle

Core Principle: There will be no assault if D honestly believed that he was preventing an unlawful assault.
Lord Lane CJ's Statement:
- Reasonableness of Belief: "The reasonableness or unreasonableness of the defendant's belief is material to the question of whether the belief was held ... at all."
- Irrelevance of Unreasonableness (for guilt): "If the belief was in fact held, its unreasonableness, so far as guilt to innocence is concerned, is neither here nor there. It is irrelevant."

VI. Implication

This case establishes the importance of honest belief in self-defence or defence of others, even if that belief is unreasonable. The focus is on the existence of the belief, not its objective validity.

LAW