Irrationality
A decision may be irrational if; it is so unreasonable that no reasonable decision maker could have come to the same decision, also known as 'Wednesbury unreasonableness' (although a less strict test applies if human rights are at stake)
What is irrationality in public law?
Irrationality or unreasonableness
It applies where the decision-making process was so unreasonable or irrational that it would not have been reached or executed by a reasonable decision-maker. ... The courts will only consider the decision-making process rather than the actual decision.
What is judicial review irrationality?
2. JUDICIAL REVIEW: Judicial review is a specialised remedy in public law by which the High Court exercises a supervisory jurisdiction over inferior courts, tribunals or other public bodies1.