Associated Provincial Picture Houses Ltd v Wednesbury Corporation [1948] 1 KB 223

In brief

Associated Provincial Picture Houses Ltd v Wednesbury Corporation [1948] 1 KB 223 is the foundational authority on the judicial review of public body discretion. Lord Greene MR held that courts may not override an executive decision simply because they consider it unwise; intervention is reserved for decisions that are illegal, taken on irrelevant grounds, or so irrational that no reasonable body could have reached them. The case establishes the three-limbed Wednesbury test — relevant considerations, irrelevant considerations, and manifest irrationality.

Key provisions

• wednesbury-1 — The Wednesbury Unreasonableness Threshold: A public body's decision can only be struck down as unreasonable if it is so absurd that no reasonable authority could ever have reached it.
• wednesbury-2 — Relevant Considerations — Must Take Into Account: A decision-maker must consider all matters expressly or impliedly required by the enabling statute, and must not ignore relevant factors.
• wednesbury-3 — Irrelevant Considerations — Must Exclude: A decision-maker must exclude from consideration matters that are not germane to the statutory purpose.
• wednesbury-4 — Courts Are Not a Court of Appeal on Merits: The court's role is supervisory, not appellate. It does not ask whether the decision was correct, only whether the decision-maker acted within the law.
• wednesbury-5 — Bad Faith and Dishonesty as Independent Grounds: Bad faith and dishonesty are standalone grounds for challenge, separate from the reasonableness test.
• wednesbury-6 — Discretion Must Be a Real Exercise of Discretion: Statutory discretion must be genuinely exercised; a body that fetters its discretion by rigid policy acts unlawfully.

When relevant

Public body decision-making, PSED compliance, judicial review vulnerability assessment. Directly relevant to Defence Mode analysis for public bodies (NHS trusts, councils, schools, police, prisons). Also relevant to the proportionality framework — Wednesbury sets the floor; Bank Mellat proportionality sets the structured test where rights are engaged.