Duff, Application for Judicial Review (Re Decision by the Planning Appeals Commission) (Rev1)

Factual and Procedural Background

This appeal arises from the refusal of leave by the High Court to the Appellant to apply for judicial review of a decision by the Planning Appeals Commission (the "Commission"). The Commission's decision dated 15 August 2024 allowed in part an appeal by Company A against an Enforcement Notice issued by Company B dated 18 March 2021 concerning quarrying and associated commercial activities at The Site. The Enforcement Notice required cessation of quarrying and removal of buildings, accesses and machinery. Company A appealed to the Commission under section 143(3) of the Planning Act (Northern Ireland) 2011. A central documentary issue concerns a 1964 planning permission granted by Londonderry County Council for the reopening of the quarry and an associated site plan containing a red line whose authenticity the Appellant contests. Procedural milestones include earlier judicial review proceedings (refused at first instance by Judge Humphreys and dismissed on appeal), the Commission's informal hearing and decision, subsequent attempts to adduce new evidence, the High Court's refusal of leave (Judge McAlinden), and this appeal to the Court of Appeal (hearing 03/12/2025).

Legal Issues Presented

1. Whether the Commission's decision to allow in part Company A's appeal (notably that the small area shaded green benefits from the 1964 planning permission) was unlawful.
2. Whether the Appellant has standing (sufficient interest) to bring judicial review proceedings in these circumstances.
3. Whether the present proceedings amount to a misuse (abuse) of the court's process by relitigation of previously decided issues.
4. Questions concerning the applicability of the Aarhus Convention costs protection regime (Article 9(3)) to the proceedings and the appropriateness of an Aarhus costs protection order.

Arguments of the Parties

Appellant's Arguments

• The Appellant contends the decisive issue is factual: the red line on the 1964 site plan was not original but was added later by unknown persons; the submitted map's red line is therefore of dubious authenticity.
• The Appellant alleges the Commission relied on an incorrect factual basis (the annotated site plan) and took immaterial or inaccurate considerations into account when determining that the green-shaded area lies within the 1964 approval.
• The Appellant sought to adduce forensic documentary evidence to support the contention that the red line was a later addition and challenged the Commission's factual finding on the balance of probabilities.
• The Appellant relied on his participation in the underlying appeal and asserted legitimate environmental concern to support standing.

Respondent's Arguments (Commission)

• The Commission submitted that the Appellant lacks standing, or alternatively that the proceedings are an abuse of process or are unarguable on their merits.
• It contended that the Commission made a permissible finding of fact on the balance of probabilities and there was no public law error (no irrelevant consideration, failure to take into account relevant considerations, or Wednesbury irrationality).
• The Commission opposed admission of the Appellant's forensic report and supported the High Court's refusal of leave.

Interested Party's Arguments (Company A)

• The Interested Party argued the Appellant's challenge was meritless, risked "floodgates" implications, and that the Appellant was relitigating issues decided in earlier proceedings.
• The Interested Party supported the view that the Commission's factual conclusion was reasonable and should not be disturbed on public law grounds.

Table of Precedents Cited

Court's Reasoning and Analysis

The court proceeded by first correctly characterising the Appellant's claim as a factual challenge to the authenticity of the red line on a 1964 site plan rather than a legal error by the Commission. The Commission had found, on the balance of probabilities, that the reproduced 1964 plan fairly reflected the area of the 1964 approval and that the small green-shaded area fell within that approval. The court accepted the Commission's factual finding as unassailable in public law terms and endorsed the reasoning of Judge McAlinden at first instance, including that the Appellant's allegations of fraud were bare, unsupported assertions requiring full particulars.

On standing, the court applied established principles (including those in Axa, Re D and Walton) and adopted a liberal approach appropriate to environmental challenges. The court identified multiple factors supporting standing: full participation by the Appellant in the underlying EN appeal, legitimate concern about environmental harm and EIA issues, absence of improper motive, lack of a better-placed challenger and contribution to the adversarial process. On this basis the Appellant was held to have a sufficient interest.

On misuse of process, the court compared the present proceedings with prior litigation and found the core issues (the integrity of the 1964 plan and red-line allegations) substantially the same. The limited differences in a later-emerging map were immaterial as the reproductions shared the same official data. Given the absence of merit and lack of any supervening public interest, the court concluded the present challenge constituted misuse (abuse) of process.

On Aarhus/costs protection the court reviewed Article 9(3) and domestic implementing regulations, noted recent English appellate authority (HM Treasury) on the scope of Article 9(3), and observed that an Aarhus costs protection order had been made in this case by consent (specifying recoverable maximums). The court recorded that the Aarhus issues were not fully argued and reserved detailed resolution of those questions for future cases.

Holding and Implications

DISMISSED. The Court of Appeal dismissed the Appellant's appeal and upheld the High Court's refusal to grant leave to apply for judicial review with the following direct effects:

• The Appellant's challenge to the Commission's decision is dismissed on the merits.
• The Appellant was held to have standing to bring the proceedings.
• The proceedings were characterised as a misuse (abuse) of process.
• The High Court's order refusing leave (Judge McAlinden) is affirmed except for the additional finding of misuse now recorded by this court.
• Costs: the Appellant must pay the Commission's costs of the appeal subject to an Aarhus costs protection ceiling of £3,600 inclusive of VAT; the Interested Party bears its own costs as usual.

No new legal precedent was established beyond the court's application of existing principles to these facts; the decision's principal consequence is to dismiss the Appellant's challenge and to record that the proceedings constitute an abuse of process.