R v. Barton

Facts

• Barton was charged with a serious criminal offence.
• The defence sought disclosure of communications between the prosecution's witness and that witness's solicitor.
• The solicitor claimed legal professional privilege over the communications.
• The defence argued that the communications were essential to establish that the witness had fabricated evidence.
• Without the privileged material, the defence could not effectively challenge the witness's credibility.

Issue

1. Whether legal professional privilege can be overridden in criminal proceedings where disclosure of the privileged communication is essential to prevent a miscarriage of justice and protect the liberty of the accused.

Held

• Legal professional privilege is not absolute and may yield in exceptional circumstances in criminal cases.
• Where the liberty of a person is at stake and the privileged communication is essential to proving innocence, the court may order disclosure.
• The exception is narrow and applies only where there is no other means of establishing the relevant fact.
• The court must balance the public interest in maintaining confidence in legal communications against the paramount interest in preventing miscarriage of justice.

Ratio Decidendi

The Court reasoned that the privilege attaching to lawyer-client communications exists to serve the public interest in the proper administration of justice by encouraging candid disclosure to legal advisers. However, where adherence to this privilege would itself result in injustice, specifically the conviction of an innocent person, the foundation of the privilege is undermined. In such exceptional cases, the overriding public interest in the liberty of the individual and the prevention of wrongful conviction must prevail. This exception applies only in clear cases where no alternative evidence is available.