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Wednesbury unreasonableness

English · WENZ-bree · Constitutional and administrative

Meaning. A ground of judicial review: a decision so unreasonable that no reasonable authority could ever have come to it.

From Associated Provincial Picture Houses v. Wednesbury Corporation (1948), where Lord Greene MR held that a court can interfere with an administrative decision only if the authority took into account irrelevant matters, ignored relevant ones, or reached a conclusion so unreasonable that no reasonable authority could have reached it. Lord Diplock in CCSU (1985) called this ground “irrationality”, alongside illegality and procedural impropriety.

The test is deliberately strict: the court does not ask whether it would have decided differently, only whether the decision is outside the range of reasonable responses. Indian courts adopted it in Tata Cellular for administrative action and contracts. Where fundamental rights are affected, Indian courts apply the stricter proportionality test instead, and courts use Wednesbury mainly for ordinary administrative decisions and punishments in service law.

Example

Dismissing a clerk for being five minutes late once is so disproportionate that it is Wednesbury unreasonable.

In Indian law

See also

proportionality · judicial review · administrative discretion · ultra vires

Read more in the study notes

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