Conversations between an accused and a police informer wearing a listening device are not necessarily excludable under the Swaffield principles where the informer initiated contact with police, the conversations did not amount to interrogation, and the deception did not place pressure on the accused to confess. Evidence of a plan to commit a further offence is admissible as context for admissions about the charged offence where the conversations are inextricably linked. Royal Commission material going to the credit of a police officer on collateral issues does not constitute fresh evidence establishing a miscarriage of justice where the jury was already aware of the essential unreliability of the informer witnesses.
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