Charley's Windsor house Limited v Prime Minister and Minister of Economic Growth & Job Creation

Judicial review-Application for leave to apply for judicial review-Threshold test: Whether the applicant has an arguable case for judicial review with a realistic prospect of success-Doctrine of ultra vires-Whether statutory authority acted ulta vires-Principles of illegality and irrationality-Whether statutory authority acted illegally and irrationally-Duty to give reasons-Whether the decision of the statutory authority should be set aside for failure to give reasons