Procedural fairness — natural justice

Public bodies must act fairly when making decisions affecting individuals—a duty comprising two ancient rules of natural justice: the rule against bias (nemo iudex in causa sua) and the right to a fair hearing (audi alteram partem). This presumptive requirement applies unless excluded by clear statutory language or necessary implication. The content of fairness varies entirely by context: what fairness demands depends on the character of the decision-making body, the kind of decision it has to make, and the statutory framework within which it operates (Lloyd v McMahon [1987] AC 625). The doctrine enables judicial supervision of administrative processes without directly challenging the merits of decisions, ensuring both instrumental benefits (better decisions through proper procedures) and non-instrumental values (dignity and legitimacy through participation).

Ridge v Baldwin [1964] AC 40: Natural justice applies to administrative decisions affecting offices, even those held 'at pleasure', where dismissal requires cause; the judicial/administrative distinction cannot determine natural justice's application. This landmark case revived procedural protection by demonstrating that historical authorities had been misread—natural justice had always protected rights and interests regardless of decision-maker characterisation.

CCSU [1985] AC 374: Established 'procedural impropriety' as a distinct judicial review ground encompassing natural justice breaches and failures to act fairly, applying even to prerogative powers unless unsuitable for judicial assessment. The case extended fairness to legitimate expectations from regular practices while recognising national security could displace procedural requirements.

Ex p Doody [1994] 1 AC 531: Common law supplies the legislature's omission by requiring reasons where fairness demands them, considering the decision's nature, individual assessment requirements, and importance of detecting legal challenges. This expanded procedural protection beyond hearing rights to encompass transparency in decision-making.

Porter v Magill [2002] 2 AC 357: The test for apparent bias asks whether a fair-minded and informed observer, having considered facts, would conclude there was a real possibility of bias. This objective standard protects public confidence while avoiding oversensitive challenges.

Courts first determine whether the duty of fairness is engaged—the decision must affect an individual or identifiable group distinguishably from the general public. Once engaged, courts apply contextual analysis considering: the nature of interests affected (rights command more protection than privileges), severity of consequences, the decision-making function's character, practical constraints, and any legitimate urgency claims.

For fair hearings, courts assess what procedures the specific context requires—from full oral hearings to simple written representations. Key components include adequate notice (knowing the case to answer), opportunity to respond (genuine chance to address adverse material), and consideration of representations (not predetermined outcomes).

For bias challenges, courts apply Porter v Magill's objective test, examining whether appearances compromise public confidence. Direct financial interests automatically disqualify; other interests require assessing whether a fair-minded observer would perceive real possibility of bias. Courts then consider remedial discretion—even proven unfairness may not void decisions if outcomes would inevitably be identical.

Students persistently conflate common law fairness with Article 6 ECHR—while overlap exists, Article 6 only covers determinations of civil rights/obligations, excluding many administrative decisions (immigration, tax) where common law fairness applies. The bias test causes confusion: it's objective (fair-minded observer) not subjective (actual prejudice), focusing on appearances not reality.

Weak answers mechanically list procedures without contextual analysis—fairness requirements vary dramatically between dismissing police chiefs and licensing taxi drivers. Many ignore statutory frameworks that may enhance, modify or exclude common law requirements. The procedure/substance distinction challenges students who conflate reviewing how decisions were made with reviewing what was decided.