| Associated Provincial Picture Houses v Wednesbury Corporation [1948] 1 KB 223 |
Two-limb test: (i) relevant/irrelevant considerations, (ii) perverse outcome |
Majority held both limbs apply to contractual discretions; employer failed on limb (i) |
| The Vainqueur Jos [1979] 1 Lloyd’s Rep 557 |
Wednesbury principles extend to contractual discretions |
Cited to support process-based review and burden on decision-maker |
| Abu Dhabi National Tanker v Product Star (No 2) [1993] 1 Lloyd’s Rep 397 |
Discretion must not be exercised arbitrarily, capriciously or unreasonably |
Used to anchor modern “irrationality” terminology |
| Paragon Finance v Nash [2002] 1 WLR 685 |
Implied term restraining mortgagee’s interest-rate discretion |
Illustrative of courts implying limitations to prevent abuse |
| Ludgate Insurance v Citibank NA [1998] Lloyd’s Rep IR 221 |
Discretion must align with contractual purpose |
Analogy drawn to employment context |
| Gan Insurance v Tai Ping (No 2) [2001] 2 All ER (Comm) 299 |
Reinsurer’s withholding of approval must be rational and bona fide |
Supports inclusion of relevant-matters limb |
| Socimer International Bank v Standard Bank Ltd [2008] Bus LR 1304 |
Decision-maker constrained by honesty, good faith, absence of irrationality |
Quoted as comprehensive summary of contractual review standard |
| Hayes v Willoughby [2013] 1 WLR 935 |
Distinction between rationality and reasonableness |
Used to explain mental-process review |
| Council of Civil Service Unions v Minister for the Civil Service [1985] AC 374 |
Lord Diplock’s definition of “irrationality” |
Paralleled to contractual setting |
| R v West London Coroner ex p Gray [1988] QB 467 |
Need for cogent evidence before finding of suicide |
Foundation for majority’s “inherent improbability” reasoning |
| The Popi M [1985] 1 WLR 948 |
Where two improbable causes exist, court not obliged to choose |
Supports possibility of “no opinion” outcome |
| In re H (Minors) [1996] AC 563 |
Only one civil standard of proof; inherent improbability requires stronger evidence |
Applied to justify need for cogent evidence of suicide |
| In re B (Children) [2009] AC 11 |
Confirmed single civil standard of proof |
Reinforced distinction between seriousness and probability |
| Laker Airways v Department of Trade [1977] QB 643 |
Consistency with statutory purpose in public-law discretion |
Cited in analogy to contractual purpose |
| British Telecommunications v Telefónica O2 UK [2014] Bus LR 765 |
Discretion must be exercised in good faith and for proper purpose |
Supports majority’s alignment of contractual and public-law standards |
| Equitable Life v Hyman [2002] 1 AC 408 |
Purpose-based limitation on contractual discretion |
Referenced to illustrate same principle |
| Clark v Nomura International plc [2000] IRLR 766 |
Employer’s bonus discretion reviewable for perversity |
Analogy for intensity of review in employment contracts |
| Johnson v Unisys Ltd [2003] 1 AC 518 |
Employment as a “relational contract” |
Used by concurring judgment to justify heightened scrutiny |
| Keen v Commerzbank AG [2007] ICR 623 |
Implied mutual duty of trust and confidence |
Supports employment-specific analysis |
| Horkulak v Cantor Fitzgerald International [2005] ICR 402 |
Court’s role in reviewing discretionary bonuses |
Contrasted with fact-finding discretion at issue here |
| Biogen Inc v Medeva PLC [1997] RPC 1 |
Appellate caution in reversing primary fact-finder |
Cited by dissent to advocate deference to employer’s conclusion |