Judicial Review Is Not a Second Chance: Unraised Climate/EIA Methodology Objections Will Not Quash Planning Permission; s.15 “Consistency” Operates as a Spectrum and EU Taxonomy Does Not Rewrite Planning “Sustainability”

Case: Friends of the Irish Environment CLG v An Coimisiun Pleanala and Ors (Approved)
Citation: [2026] IEHC 205 (High Court, Humphreys J., 1 April 2026)
Decision under challenge: Commission permission (13 March 2025) for a 600MW CCGT power plant and 120MWh BESS, Kilcolgan Lower/Ralappane, Co. Kerry (ABP Ref PA08.319566)

1. Introduction

This judgment concerns a judicial review brought by Friends of the Irish Environment CLG (“FIE”), a prominent environmental NGO, against An Coimisiún Pleanála (“the Commission”) and others, with Shannon LNG Limited as notice party. The dispute arose from the Commission’s grant of permission for a strategic infrastructure development: three combined-cycle gas turbines (600MW total) plus a 120MWh battery energy storage system on the Shannon Estuary in County Kerry.

The case is set against (i) Ireland’s legally binding climate architecture under the Climate Action and Low Carbon Development Act 2015 as amended in 2021, (ii) the policy position in Climate Action Plan 2024 supporting “Delivery of at least 2 GWs of new flexible gas-fired generation”, and (iii) EU environmental assessment law (EIA and Habitats Directives). It is also a further chapter in extensive prior litigation around “Shannon LNG” (the seventh written decision relating to the overall project history).

The core issues ultimately pursued were:

  • Climate law / domestic law: whether the Commission acted “consistent” (insofar as practicable) with s.15(1) of the 2015 Act in approving a gas-fired plant, including challenges framed around emissions calculations, carbon budgets and sectoral ceilings.
  • EIA Directive: whether the EIAR’s approach to greenhouse gas (GHG) quantification and disclosure was defective such that the Commission’s EIA and public participation obligations were breached.
  • EU Taxonomy Regulation: whether EU “sustainable investment” taxonomy standards constrain national planning “sustainable development” findings.
  • Habitats Directive / Appropriate Assessment: whether minor Annex I habitat loss and conservation-objective language prevented a lawful “no adverse effect on integrity” conclusion, invoking Sweetman.

A decisive contextual feature was procedural: the Commission contended (and the Court agreed) that none of the issues maintained by FIE had been raised before the Commission during the planning process, and that the case largely depended on post-decision evidence and methodology critiques (notably an affidavit from Mr Paul Price) not before the decision-maker.

2. Summary of the Judgment

Humphreys J. dismissed the proceedings. The Court held, in substance, that:

  • Judicial review is not generally a “second chance” to raise issues that could have been made in the administrative process; FIE’s failure to raise its principal complaints before the Commission was “terminal” for much of the case.
  • Even where EU law imposes autonomous obligations (e.g., EIA/AA), a judicial review challenge is assessed through the prism of what was before the decision-maker; the applicant retains the burden to displace the Commission’s reasoned conclusions, which FIE did not do.
  • Under s.15 of the 2015 Act (as interpreted by Coolglass), climate-consistency is a spectrum, not a “traffic light” prohibition. The Commission’s approval of a flexible gas plant, framed as supporting renewables and grid resilience, fell within the permissible range.
  • Arguments seeking to transform carbon budgets/sectoral ceilings into project-level prohibitions were rejected; s.15 does not directly incorporate those instruments as hard thresholds.
  • The EU Taxonomy Regulation is a finance transparency/classification instrument and does not apply to planning consents; it cannot be “read across” to redefine national planning “sustainability”.
  • On Appropriate Assessment, minor habitat loss did not, on the evidence, create a risk of “lasting harm”/“irreparable destruction” as required by Sweetman v An Bord Pleanála, C-258/11; the Commission was entitled to conclude no adverse effect on integrity.

The Court also set out (and applied) a structured, cumulative framework for judicial review relief (previously articulated in Reilly v. An Coimisiún Pleanála [2025] IEHC 659), emphasizing pleading precision, burden of proof, materiality/harmless error, and discretion.

3. Analysis

3.1 Precedents Cited (and How They Shaped the Decision)

A. Climate duty under s.15: Coolglass as the controlling framework

The legal centre of gravity for the climate arguments was Coolglass v. An Coimisiún Pleanála [2026] IESC 5. Humphreys J. treated Coolglass as definitively establishing that:

  • s.15 is real, effective, and enforceable, and “more than” a mere “have regard to” obligation;
  • but compliance involves a range of outcomes and is qualified by “in so far as practicable”;
  • in individual planning decisions, consistency is complex and not reducible to “go/stop” depending on whether a project emits GHGs;
  • a decision-maker may start from a presumption that plans/policies (e.g., CAP24) are themselves climate-consistent, unless displaced.

Humphreys J. used Coolglass to reject FIE’s attempt to treat carbon budgets/sectoral ceilings as binding project-level “caps”, and to uphold the Commission’s policy-based justification (security of supply, dispatchability, displacement of more carbon-intensive generation, ETS coverage, time-limited operation to 2050, and “back-up to intermittent renewable energy only” conditions).

B. “Second chance” litigation: failure to raise issues during consultation

The judgment’s procedural pivot draws heavily on authorities warning against withholding points during consultation and then litigating them later:

  • Friends of the Irish Environment CLG v. Government of Ireland & Ors. [2021] IECA 317: Costello J. (as quoted) described it as “unfair” and “inimical to good decision making” to reserve submissions for judicial review when they “could and ought” to have been raised earlier. Humphreys J. treated this as directly applicable given FIE’s non-participation on the key points.
  • Monkstown Road Residents Association v. An Bord Pleanála [2022] IEHC 318: cited for the proposition that judicial review is not generally a second chance to demand a decision-maker resolve controversies based on evidence that was never before it.
  • North Great Georges Street Preservation Society v. An Bord Pleanála [2023] IEHC 241: relied upon for the practical point that if something is not an autonomous duty and was not raised, introducing it later typically cannot ground quashing.

Humphreys J. acknowledged that EU-law duties (like EIA/AA) can be challenged even if not raised, but insisted the court must still evaluate legality by reference to the decision-maker’s record and the applicant’s burden to show defect—an approach also consistent with the Court’s broader burden-of-proof discussion grounded in Irish planning JR jurisprudence (including An Taisce v. an Bord Pleanála & Ors. [2022] IESC 8 as cited in the onus section).

C. Standard of review, reading decisions “in the round”, and avoiding micro-parsing

The Court’s reasoning is steeped in orthodox judicial review restraint:

  • Sweeney v. Fahy [2014] IESC 50 and the State (Keegan) v. Stardust Compensation Tribunal [1986] I.R. 642: legality not merits; no substitution of the court’s view.
  • Meadows v. Minister for Justice, Equality and Law Reform [2010] IESC 3: cited in support of general JR principles and burden orientation.
  • Tesco Stores Ltd v. Secretary of State for the Environment [1995] 1 WLR 759 (HL): weight afforded to considerations is for the decision-maker.
  • Sherwin v. An Bord Pleanála [2024] IESC 13: evaluative planning judgments are generally reviewable on irrationality absent other error.
  • Authorities against semantic micro-analysis include R (Blewett) v. Derbyshire County Council [2003] EWHC 2775 (Admin) and the Supreme Court’s warning against “elaborate procedures at every point” in O'Sullivan v. Health Service Executive [2023] IESC 11.

This doctrinal frame mattered to how the Court dealt with: (i) alleged numerical “errors” (e.g., 4 Mt vs 3 Mt), (ii) emissions-factor disputes, and (iii) interpretation of what the Commission/Inspector was “really” doing—Humphreys J. repeatedly insisted decisions must be read as valid where a valid reading is reasonably available.

D. EU environmental assessment law: Sweetman, Briels, and “accurate impression” cases

On AA, FIE invoked Sweetman v An Bord Pleanála, C-258/11, ECLI:EU:C:2013:220 for the proposition that any loss of qualifying habitat necessarily affects site integrity. Humphreys J. rejected that reading, emphasizing the judgment’s focus on risk of lasting harm and partial and irreparable destruction, and held that the Commission could, on the evidence, treat the small-scale habitat loss as not triggering that standard.

FIE also relied on Case C-521/12 Briels (compensation vs mitigation). The Court distinguished the situation, treating the Commission’s approach as one of assessment of limited impact rather than an impermissible after-the-fact “compensation” strategy.

On EIA transparency, the Court noted the logic of IL and Others v Land Nordrhein-Westfalen, C-535/18, ECLI:EU:C:2020:391 (in the WFD context) about enabling the public to have “an accurate impression” of impacts, but held that this does not remove the applicant’s evidential burden to show insufficiency, particularly in light of permissible confidentiality under the EIA Directive (art. 10).

E. Aarhus / effective remedy arguments

FIE pleaded reliance on Case C-470/16 North East Pylon Pressure Campaign Limited v. An Bord Pleanála and Aarhus-consistent interpretation. Humphreys J. rejected the attempted move to treat EU/Aarhus principles as disabling domestic procedural restraint and discretion for purely domestic claims, characterising it as an over-extension of EU law into national procedural rules.

F. EU Taxonomy “sustainability” argument rejected by scope analysis

For the attempted “read across” from Regulation (EU) 2020/852, the Court accepted the Commission’s scope-based answer: art. 1 confines the regime to financial market and corporate reporting contexts. The Taxonomy Regulation is not a planning-consent standard, and cannot be used to re-engineer the meaning of “sustainable development” in Irish planning law.

G. Draft judgment confidentiality direction

Though ancillary to the merits, Humphreys J. issued an immediately effective direction restraining publication of draft judgments and cited comparative authorities including Attorney General v. Crosland (No. 2) [2021] UKSC 58, reflecting an emerging procedural discipline around draft circulation, confidentiality, and the administration of justice.

3.2 Legal Reasoning

A. The “lens” principle: legality judged by the record before the decision-maker

A unifying theme is the insistence that judicial review generally examines legality based on what the Commission had before it at the time. Humphreys J. allowed for exceptions (e.g., true autonomous duties; patent flaws), but resisted attempts to transform post-decision expert critiques into retroactive illegality. This is why the Price affidavit—central to FIE’s emissions-factor attack—was treated as having limited traction: it had not informed the Commission’s evaluative process, and no “obvious to any reasonable decision-maker” error was shown.

B. Climate (s.15) treated as system-context assessment, not project isolation

On s.15, the Court’s key move was to treat the plant in electricity system context, not as an isolated new source of gross emissions. The Commission relied on the notion of:

  • dispatchability and resilience during renewable “dark lulls” (“Dunkelflaute”);
  • displacement of more carbon-intensive or less efficient generation (a baseline/counterfactual analysis);
  • ETS coverage; and
  • conditions limiting operation to back-up use and expiring in 2050.

Humphreys J. accepted that this package fell within the Coolglass spectrum of “consistent, so far as practicable” outcomes. Importantly, the Court did not adopt a simplistic “gas is good” position; it acknowledged the climate emergency, but held the legal question was whether FIE demonstrated a sufficiently convincing legal basis to displace the Commission’s reasoned conclusion.

C. Carbon budgets and sectoral ceilings: no pleaded “route map” to project-level enforceability

The judgment treats carbon budgets/sectoral ceilings as politically and legally significant, but rejects the claim that they automatically function as project-level consent thresholds via s.15. Two reasoning strands dominate:

  • Textual/statutory structure: s.15 does not itself refer to carbon budgets/SECs (ss.6A–6D), which undermines a claim of direct “consistency” enforceability at the project permission level.
  • Pleading discipline: the Court found no adequate pleaded “route map” connecting the asserted budget/SEC arguments to certiorari in the manner required by Order 84 r.20(3) principles repeatedly rehearsed in the judgment.

D. EIA: methodology disputes are primarily evaluative unless a legal minimum is breached

For the EIA complaints, Humphreys J. accepted the Commission’s autonomous obligation to reach a reasoned conclusion. But he found:

  • the Commission did reach such a conclusion;
  • the EIAR (especially the climate chapter) disclosed forecasting methods at a level the Commission could accept; and
  • confidentiality is expressly accommodated by EIA Directive art. 10.

Crucially, the Court declined to impose a “mandatory checklist” of detailed parameters that must always be disclosed, treating information-sufficiency as a context-sensitive evaluative question within a margin of judgment—one the applicant failed to overturn on evidence.

E. AA: “any habitat loss equals integrity harm” rejected; scale and permanence matter

On AA, the Court held that Sweetman does not establish a per se rule that any qualifying habitat loss defeats integrity. Instead, the decision-maker must consider whether there is a risk of lasting harm / irreparable destruction. On the record (tiny percentages of large habitat extents; dynamic environment; re-establishment anticipated), the Commission could lawfully conclude no adverse effect on integrity.

F. Discretion and proportionality (obiter)

Although the proceedings were dismissed on the merits/procedural posture, Humphreys J. also indicated (obiter) that discretion would weigh against certiorari where the applicant had not raised points during the process and where alleged defects were not shown to be material in the relevant doctrinal sense.

3.3 Impact

  • Procedural discipline in environmental JR: The judgment strengthens the practical expectation that sophisticated participants—especially repeat litigants—should raise technical methodological critiques (emissions factors, modelling assumptions) during the planning process. While EU-law challenges remain possible, the evidential and record-based “lens” makes late-developed cases hard to win.
  • Climate litigation after Coolglass: The decision operationalises Coolglass in an emissions-causing project context: s.15 does not equate to an immediate prohibition on fossil-based infrastructure where policy frames it as transitional/resilience-critical, particularly where conditions limit operation and duration.
  • EU Taxonomy arguments curtailed: The Court’s scope-based rejection signals that EU sustainable finance classifications are unlikely to become a backdoor substantive planning standard absent legislative change.
  • AA threshold clarified in practice: By rejecting an absolutist reading of Sweetman, the judgment reinforces a fact-sensitive approach: scale, vulnerability, permanence, and scientific doubt are decisive, not a “zero tolerance” rule for any habitat loss.
  • Draft judgment confidentiality: The express direction and comparative citations may influence Irish practice on draft circulation, particularly in high-profile public law cases.

4. Complex Concepts Simplified

  • Judicial review vs appeal: Judicial review asks “was the decision made lawfully?” not “was it the best or correct decision?” The court will not re-decide planning merits.
  • Autonomous EU obligations: Some EU duties (EIA/AA) must be complied with regardless of submissions. But the challenger still must prove the decision-maker’s conclusion was legally defective on the record.
  • s.15 ‘consistent, so far as practicable’: A binding duty, but flexible. Many outcomes can be “consistent” depending on context. It is not a strict project-level emissions veto.
  • Carbon budgets / sectoral ceilings: National macro-limits and planning-relevant considerations, but (as treated here) not automatically individual-permission thresholds unless the statutory scheme or pleaded legal route establishes that effect.
  • Baseline / counterfactual in emissions: The key question may be “compared to what would happen otherwise?” If a new plant displaces dirtier/less efficient generation, net system impact may differ from gross emissions.
  • Appropriate Assessment ‘integrity’: The test is whether, beyond reasonable scientific doubt, the project will not adversely affect the site’s integrity (its coherence and ecological functions), not whether it has any impact at all.
  • In-combination effects: Effects arising when a project is considered together with other plans/projects. The duty is to assess likely combined impacts, but challenges require evidential grounding and proper pleading.

5. Conclusion

[2026] IEHC 205 is significant less for endorsing gas generation as such, and more for its firm procedural and doctrinal message in climate-and-environment planning litigation:

  • Do not hold back technical objections for court. Where complaints depend on contested methodology or expert critique, failure to raise them in the planning process can be fatal in practice.
  • After Coolglass, s.15 is enforceable but not absolutist. “Consistency” is a spectrum shaped by practicability, policy context, and the planning authority’s statutory role.
  • EU finance taxonomy is not a planning consent rule. Attempts to re-define national “sustainable development” via the Taxonomy Regulation are misconceived.
  • Sweetman is not a per se habitat-loss veto. The legal focus remains on lasting harm/irreparable destruction and the elimination of reasonable scientific doubt on integrity.

The decision thus consolidates a high bar for quashing strategic energy permissions on late-developed climate/EIA methodology grounds, while leaving open—consistent with EU law—the possibility of successful challenges where defects are apparent on the record, properly pleaded, and evidenced to the requisite standard.