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Rural Residents Wind Aware and Environmental Group and Ors v An Coimisiun Pleanala and Ors [I] [No. 2] (Approved)
Factual and Procedural Background
The Plaintiffs challenged a planning permission granted on 21 November 2023 by the Defendant (the planning commission) for a 7-turbine windfarm and associated works in a group of townlands located across two counties. The application for Strategic Infrastructure Development was made by Company A and was accompanied by an EIAR and NIS. The Defendant sought further information from Company A; no oral hearing was held. A planning inspector reported recommending permission and the Defendant granted permission subject to conditions. The Plaintiffs issued two sets of proceedings: one challenging the parent permission (the present proceedings) and a second challenging an amendment to the permission. The proceedings were modularised. Module I was heard in September–October 2025 (judgment issued 6 November 2025) and Module II was heard on 12 February 2026. A draft judgment was circulated to the parties on 17 February 2026. The present judgment (delivered by Judge Humphreys on 6 March 2026) resolves the remaining Module II issues.
Legal Issues Presented
- Whether the impugned decision was invalid because the application wrongly implied landowner consent for parts of the site (core ground 1).
- Whether Article 214(1) of the Planning and Development Regulations 2001 is invalid for omitting an express requirement that an SID applicant provide written landowner consent (core ground 8A).
- Whether any identified procedural or legal errors were material (i.e. not harmless) such as to warrant certiorari rather than being addressed by amendment or discretion.
Arguments of the Parties
Plaintiffs' Arguments
- The application implied letters of landowner consent had been supplied when they had not, rendering the application invalid and the Defendant's decision contrary to fair procedures and section 37E(2).
- Article 214(1) is invalid because it does not require written landowner consent for SID applications, contrary to the property interest test derived from precedent.
- The EIAR and related publicity failed in ways alleged (EIA Directive and related grounds were pleaded in the proceedings).
Defendant's and State Respondents' Arguments
- The original consent problem, insofar as it existed, has been rectified by a lawful amendment to the permission; any historical defect is now harmless and does not sustain certiorari.
- Article 214(1) benefits from a presumption of validity; the statutory scheme and constitutional obligations should be read to avoid invalidity and do not require the specific textual insertion alleged by the Plaintiffs.
- Any constitutional or regulatory challenge to Article 214(1) is moot or lacks sufficient interest given the amendment and remedial steps taken.
Company A (Notice Party) Arguments
- No express statutory requirement for landowner consent for SID applications exists; Company A acted in good faith and believed it had consent.
- The consent issue is moot because turbines alleged to be on the Plaintiffs' land were moved by the amendment.
- Any challenge should be resolved on discretionary grounds and not by quashing the permission where the practical problem has been remedied.
Table of Precedents Cited
| Precedent | Rule or Principle Cited For | Application by the Court |
|---|---|---|
| Case: O'Sullivan v. Health Service Executive [2023] IESC 11 | Draft-judgment circulation and limits on re-argument; procedural guidance. | Used to explain the court's draft judgment procedure and limits on parties' responses. |
| Case: O'Sullivan v. Sea Fisheries Protection Authority [2017] IESC 75 | Warning against treating non-trial procedures as equivalent to criminal procedure. | Cited for caution about procedural expectations in civil judicial review. |
| Case: Attorney General v. Crosland (No. 2) [2021] UKSC 58 | Restriction on publication/circulation of draft judgments. | Supported the court's direction limiting distribution of the draft judgment. |
| Case: Reilly v. An Coimisiún Pleanála [2025] IEHC 659 | Eight-fold test for relief by judicial review (jurisdiction, legal merit, pleading, standing, materiality, onus, harmlessness, discretion). | Formed the framework for assessing whether relief should be granted. |
| Case: Foran v. An Coimisiún Pleanála & Glenveagh [2026] IEHC 23 | Application of the eight-fold test in planning context. | Reinforced approach to cumulative tests for relief in planning judicial review. |
| Case: Sweeney v. Fahy [2014] IESC 50 | Judicial review concerns legality not merits; not an appeal. | Reiterated the legal standard limiting review to legality. |
| Case: State (Keegan) v. Stardust Compensation Tribunal [1986] I.R. 642 | Separation of roles between courts and administrators; limits of judicial substitution. | Supported principle courts must not substitute their view for that of decision-makers. |
| Case: Meadows v. Minister for Justice, Equality and Law Reform [2010] IESC 3 | Limits of judicial review as not substituting merits decisions. | Cited as authority on scope of judicial review. |
| Case: R (Cart) v. Upper Tribunal [2011] UKSC 28 | Distinguishing legal errors from factual/conclusions; not all arguments are points of law. | Illustrated care before treating factual complaints as legal errors. |
| Case: M.R. (Bangladesh) v. International Protection Appeals Tribunal [2020] IEHC 41 | Read decisions so they make sense; avoid most erroneous reading. | Used to support approach of reading administrative decisions holistically. |
| Case: Altrip (Gemeinde Altrip and Others v Land Rheinland-Pfalz) C-72/12 | Doctrine on harmless procedural error in EIA context; court may find defect harmless using case-file and evidence. | Central to the court's harmless-error analysis and the possibility of upholding a permission despite procedural defects. |
| Case: Holohan (C-461/17) | Obligations to assess alternatives in EIA context. | Cited in relation to alleged omissions in the EIAR. |
| Case: Derrybrien Wind Farm (Commission v Ireland C-261/18) | Remedying breaches of EU law: certiorari normally required where the error would have material effect. | Referenced to note exceptional circumstances where after-the-event assessments are limited. |
| Case: Carrownagowan Concern Group v. An Bord Pleanála [2025] IESCDET 9 | Harmless error doctrine; not every error requires quashing where outcome unaffected. | Supported view that harmlessness can defeat the need for certiorari. |
| Case: Massey v. An Bord Pleanála [2025] IESCDET 126 | Affirmation of harmless-error doctrine in determination context. | Used to confirm harmlessness principles derived from EU law and domestic practice. |
| Case: R (Champion) v. North Norfolk District Council [2015] UKSC 52 | Approach to harmlessness and reliance on evidence to exclude doubt. | Supported the proposition that courts may rely on developer evidence to find harmlessness. |
| Case: Tesco Stores Ltd v. Secretary of State for the Environment [1995] 1 WLR 759 | Evaluative judgments and weight of evidence are for decision-taker. | Reinforced deference to planning judgements unless irrational. |
| Case: Ballyboden Tidy Towns Group v. An Bord Pleanála [2024] IESC 4 | Court's discretion to refuse certiorari despite errors; court not at large but may exercise discretion. | Cited to support discretionary refusal to quash where alternative remedies exist. |
| Case: Friends of the Irish Environment CLG v. Government of Ireland [2021] IECA 317 | Constraints on raising issues first in judicial review that could have been raised during public consultation. | Applied in assessing fairness and the Plaintiffs' conduct in public participation. |
| Case: Frescati Estates v. Walker [1975] I.R. 177 | Principle on property rights and 'interest' test relevant to vexatious applications and intrusion on property rights. | Used as background to the landowner consent argument and the requirement that an applicant have a legal right or consent to proceed. |
| Case: East Donegal Co-Operative Livestock Mart Ltd v. Attorney General [1970] I.R. 317 | Legislation need not expressly state limitations required by the Constitution; constitutional compatibility by interpretation. | Supported the court's view that omission to spell out a constitutional constraint in regulations does not by itself invalidate them. |
| Case: Okunade v. Minister for Justice [2018] IESC 56 | Judicial review is not an exercise in pointless formalism. | Referred to in discussing practical and proportionate remedies. |
| Case: Heather Hill Management Company CLG v. An Bord Pleanála [2022] IEHC 146 | Approach to EIA/AA and assessment of materiality of defects. | Cited in relation to assessing EIA sufficiency and materiality. |
| Case: Other domestic High Court and Supreme Court authorities (various) | Supporting principles: discretion, standing, reading decisions in context, and harmlessness. | Collected authority relied upon across the court's reasoning to articulate established principles. |
Court's Reasoning and Analysis
The court proceeded by reference to established principles governing judicial review in the planning and environmental context. It framed a cumulative eight-fold test for relief (jurisdictional requirements, legal correctness, pleading specificity, issue-specific standing, materiality of material before decision-maker, onus of proof, transcendence of harmless error, and discretion). The court emphasised that judicial review addresses legality not merits and that evaluative planning judgments attract deference unless irrational.
Applying those principles the court accepted that there was an initial error in the parent permission because elements of the proposed development implicitly relied on landowner consent that had not been given. However, that error was subsequently rectified by a lawful amendment (the s.146B amendment). The court held that once the substantive defect had been corrected, the original problem became historical, technical and de minimis. Under the harmless-error doctrine (including the guidance derived from Altrip and subsequent authorities), the court may, and should, assess whether an identified procedural or EU-law error could reasonably have affected the outcome. The court concluded that the Plaintiffs failed to identify a continuing material injury or live controversy: the remediation removed any real-world prejudice and therefore standing to obtain certiorari on that ground.
On the challenge to Article 214(1), the Plaintiffs withdrew that ground at hearing; the court additionally held that the argument lacked foundation because legislation is not invalid merely because it does not expressly restate constitutional limits and because the statutory scheme and principles of interpretation support reading Article 214(1) in a constitutionally compatible way. The court also accepted that, even if an error had existed, discretion weighed strongly against quashing a permission where the defect had been promptly corrected and where no ongoing prejudice existed.
The court therefore resolved the remaining Module II issues by applying (i) standing and materiality principles, (ii) harmless-error doctrine permitting reliance on the totality of the case-file and post-decision rectification, and (iii) exercise of judicial discretion to decline certiorari where disproportionate in the circumstances.
Holding and Implications
HOLDING: The proceedings are DISMISSED.
Implications: The court dismissed the remaining grounds. The practical consequence is that the planning permission (as amended) stands and no certiorari is granted. The court emphasised that rectification of an original procedural defect can render a challenge moot or technical such that relief is inappropriate; no new precedent was established beyond application of existing principles (standing, harmless-error doctrine, deference to evaluative planning judgments, and the discretionary nature of certiorari). The order contemplated no general award of costs unless parties apply as directed within the timetable set out by the court.
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