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Common law (self defence)

The common law defence of self-defence applies where the defendant uses necessary, reasonable and proportionate force to defend themselves or another from imminent attack. It is a complete defence to all non-sexual offences involving the unlawful use of force (anything from battery to murder). Because the defence results in a complete acquittal, the courts have interpreted the defence in a restrictive way so as to avoid acquitting too easily. For example, the courts will not usually acquit the defendant just because he thought the force used was reasonable – whether or not the force used was reasonable will be objectively assessed by the jury and not simply according to what the defendant thought at the time.