Judicial Review: Permission Stage vs Substantive Hearing
Judicial review (JR) proceedings under CPR Part 54 have two distinct stages: the permission stage (paper or oral), where the court filters out unarguable claims, and the substantive hearing, where the full merits are determined and remedies are decided.
Overview
Judicial review is the mechanism by which the High Court (Administrative Court) supervises the exercise of public functions by public bodies — government departments, local authorities, tribunals, regulators, and other bodies exercising public law functions. A claim for judicial review challenges the lawfulness of a decision, action, or omission by a public body on grounds including illegality, irrationality (Wednesbury unreasonableness), procedural unfairness, breach of legitimate expectation, or incompatibility with Convention rights (Human Rights Act 1998). CPR Part 54 governs judicial review procedure. The process has two mandatory stages. The first is the permission stage: the claimant must satisfy the court that the claim is arguable — that it has a realistic prospect of success. The application for permission is usually considered on the papers by a single judge; if refused, the claimant can renew the application at an oral hearing (CPR 54.12). Only if permission is granted does the claim proceed to the substantive hearing, at which both parties make full submissions, evidence can be relied upon, and the court determines the lawfulness of the challenged decision. If the claim succeeds, the court can grant a range of remedies: quashing order (certiorari), mandatory order (mandamus), prohibiting order (prohibition), declaration, injunction, or damages (rare in public law).
Side-by-Side Comparison
Permission Stage
Pros
- Low threshold — arguable case, not likely to succeed; claims with a realistic prospect of raising a public law issue will usually get permission
- Paper process — the initial permission decision is made on the documents without an oral hearing, keeping costs lower at this stage
- Oral renewal available — if refused on papers, claimant can renew at an oral hearing before a different judge
- Limits defendant's costs exposure — defendant does not need to file full detailed grounds until after permission is granted
Cons
- Strict time limits — claim must be filed promptly and in any event within 3 months of the impugned decision (CPR 54.5); shorter periods apply for planning (6 weeks) and procurement (30 days)
- Cost of permission application — claimant must pay the court fee (£154 for the permission application) and legal costs of preparing the papers
- Costs risk on refusal — if permission is refused at oral renewal, the defendant can seek costs of attending the renewal hearing
- Oral renewal hearing not guaranteed — High Court may decline renewal in some cases
Best For
Any claimant who has identified an arguable public law error and intends to challenge a public body's decision — the permission stage is an unavoidable gateway to substantive judicial review.
Substantive Hearing
Pros
- Full merits determination — both parties can present evidence, expert opinion, and full legal argument
- Wide range of remedies — quashing order, mandatory order, prohibiting order, declaration, injunction, and (exceptionally) damages
- Ability to challenge rationality, proportionality, and procedural fairness on full facts
- Protective costs orders (PCOs) and Aarhus Convention costs protection available in environmental and some planning cases — limiting costs risk
Cons
- Expensive — full substantive hearings involve extensive skeleton arguments, evidence bundles, and counsel; costs can reach tens of thousands of pounds
- Costs risk on failure — unsuccessful claimant usually ordered to pay defendant's costs (unless a costs protection order applies)
- Court's role is supervisory, not appellate — the Administrative Court does not substitute its own decision for that of the public body; it quashes and remits for reconsideration
- Delay — substantive hearings in the Administrative Court may be listed 9–18 months after permission is granted
Best For
Claims that have been granted permission and where the public law error is sufficiently serious to justify the cost and time of a full hearing — typically decisions affecting fundamental rights, unlawful policy, or significant public interest issues.
Key Differences
Our Recommendation
Judicial review is a specialist and expensive form of litigation — claimants should take expert public law advice before filing, to assess both the arguability of the grounds and the costs risk. The permission stage is a necessary filter: if permission is refused at paper stage and again at oral renewal, the claim is at an end and costs may be awarded against the claimant. Pre-action correspondence with the public body (the Pre-Action Protocol for Judicial Review, PAP-JR) is required before filing and may result in the decision being reconsidered without the need for proceedings. Protective costs orders are available in environmental cases (Aarhus Convention, CPR 46.24-26) and should be sought early to limit costs exposure in public interest litigation.