Alternative Sites in National Landscape Cases: an Unconsidered Specific Option Is Not Material Where the Committee Granted Permission Knowing Other Alternatives May Exist

1) Introduction

The appellant, a company operating an outdoor education facility for children, challenged Norfolk County Council’s grant of planning permission (5 June 2024) for a replacement Household Waste Recycling Centre (“HWRC”). The proposed HWRC lay within the Norfolk Coast National Landscape (“NL”) (formerly an AONB), close to the appellant’s land.

The pivotal policy constraint was North Norfolk District Council Local Development Framework Core Strategy (2008) Policy EN1, which permits development with adverse effects in the NL only where (i) it cannot be located on alternative sites causing less harm and (ii) benefits clearly outweigh adverse impacts. In that context, the availability of alternative sites was treated as a mandatory material consideration.

The appeal focused on alternative sites: the appellant argued that a quarry site outside the NL (East Beckham Quarry) had been wrongly omitted/misunderstood, and that this either (a) constituted a material error of fact, or (b) rendered the committee officer report materially misleading. A related ground challenged the refusal to admit late evidence and permit an amended pleading raising the error-of-fact case.

3) What the Court Decided (Outcome)

The Court of Appeal upheld Lieven J’s dismissal of the judicial review. The planning permission remained valid. The Court’s core reasoning was that the committee’s decision (via the officer report) already incorporated the risk/possibility of unidentified alternative sites outside the NL—and nonetheless granted permission based on the planning balance (need for a fit-for-purpose HWRC, highway improvements, and limited landscape harm, albeit within a “finely balanced” judgment).

4) Analysis

4.1 The development plan made “alternatives” legally mandatory here

The Court distinguished two ideas: (i) alternatives as a consideration a decision-maker may consider, versus (ii) alternatives as a consideration a decision-maker must consider. Applying section 70(2) of the Town and Country Planning Act 1990 and section 38(6) of the Planning and Compulsory Purchase Act 2004, the Court held that Policy EN1 itself required the authority to consider alternative sites where adverse NL effects existed. That made alternatives a mandatory material consideration on these facts.

4.2 Why the “missing quarry” did not make the decision unlawful

The appellant’s argument depended on treating East Beckham Quarry as a decisive “outside NL” alternative that should have been before members. The Court accepted that the case officer had misunderstood which quarry was referenced in the supporting statement, but held the mistake was immaterial because:

• the officer report expressly told members the site selection evidence was old/limited and not robust;
• the authority “cannot categorically say” no alternative site outside the NL existed; and
• the recommendation to grant was made despite that acknowledged uncertainty, treating it as a negative factor and still finding the public interest and limited harm justified permission.

In other words, the committee did not proceed on the false premise “there is no outside-NL alternative”; it proceeded on the premise “there may be one, but permission is still justified”.

4.3 Error of fact: applying E v Secretary of State for the Home Department

The Court applied the classic criteria from E v Secretary of State for the Home Department for when a factual mistake constitutes an error of law, emphasising materiality. Even if there were a mistake (misidentifying the quarry), the Court held it did not play a “material (not necessarily decisive) part” in the reasoning because the planning balance was struck on an explicit recognition that alternatives might exist.

The Court also rejected (or at least doubted) the notion that the “landowner did not engage” line was an “established” factual error of the E type, given the email chronology and lapse of time; and, in any event, it was not material to the committee’s reasoning.

4.4 Officer reports: applying Mansell v Tonbridge and Malling Borough Council and R (on the application of Loader) v Rother DC and Churchill Retirement Living Limited

The Court tested the officer report against the “materially misleading” standard summarised in Mansell v Tonbridge and Malling Borough Council: whether, on a fair reading as a whole, the report materially misled members on something bearing on the decision, left uncorrected, such that the decision would or might have been different.

Here, the report was not materially misleading because it did not suppress or distort the key point; it squarely presented to members that the alternatives exercise was inadequate and that outside-NL alternatives could exist, and it factored that into the recommendation as a reason the proposal was a “departure”. The case therefore contrasts with R (on the application of Loader) v Rother DC and Churchill Retirement Living Limited, where members were misinformed about a consultation position on a matter potentially capable of affecting the outcome.

4.5 Precedents cited (and how they shaped the reasoning)

• R on the application of Samuel Smith Old Brewery (Tadcaster and others) v North Yorkshire County Council: used for the framework on “material considerations” and the Court’s role in reviewing whether a consideration is mandatory. It also imported Carnwath’s earlier analysis of alternative sites in planning.
• Derbyshire Dales District Council v Secretary of State for Communities and Local Government: provided the key distinction between potentially relevant and necessarily relevant considerations, and the proposition that alternatives become mandatory only if statute/policy (expressly or impliedly) requires them. The Court of Appeal treated this as directly applicable, but noted that this case was stronger for “mandatory alternatives” because Policy EN1 expressly required them.
• Trusthouse Forte Hotels Ltd v Secretary of State for the Environment: cited for the practical planning-law principles on when alternative sites are relevant/necessary (especially where harm is significant and need is relied upon), and when comparability analysis may be unnecessary if impact is slight. The Court’s outcome is consistent with that spectrum: the report framed impacts as limited and the judgment as finely balanced, supporting a proportionate approach.
• E v Secretary of State for the Home Department: supplied the four-part test for mistake-of-fact unfairness as an error of law; the appeal failed chiefly on the fourth limb (materiality).
• Mansell v Tonbridge and Malling Borough Council: the leading synthesis on officer report challenges; applied to conclude there was no material misleadingness because the report highlighted (rather than concealed) the alternatives deficiency.
• R (on the application of Loader) v Rother District Council and R (on the application of Loader) v Rother DC and Churchill Retirement Living Limited: used as an illustration of when a misleading report is material, reinforcing why transparency in this report prevented the challenge succeeding.
• Associated Provincial Picture Houses Ltd. v Wednesbury Corporation, CreedNZ Inc v Governor General, In re Findlay, Bolton Metropolitan Borough Council v Secretary of State for the Environment and Greater Manchester Waste Disposal Authority, Stringer v Minister of Housing and Local Government, Tesco Stores Ltd v Secretary of State for the Environment and West Oxfordshire District Council: cited (via the material considerations authorities) for the boundaries of judicial review—courts police legal obligation and rationality, not the planning merits or weight.
• R. v Selby District Council, ex parte Oxton Farms, R. (on the application of Siraj) v Kirklees Metropolitan Borough Council, R. (on the application of Zurich Assurance Ltd., t/a Threadneedle Property Investments) v North Lincolnshire Council, R. (on the application of Morge) v Hampshire County Council, R. v Mendip District Council, ex parte Fabre, Palmer v Herefordshire Council, Watermead Parish Council v Aylesbury Vale District Council, R. (on the application of Williams) v Powys County Council: collectively underpin the “reasonable benevolence” approach to reading officer reports and the high threshold for showing material misdirection.

4.6 Impact and significance

The decision clarifies an important practical point for NL/AONB (and analogous protected landscape) decision-making: even where a development plan policy makes alternatives a mandatory consideration, a permission will not be quashed merely because a particular alternative site was not identified—if the officer report and committee decision-making explicitly proceeded on the basis that alternatives may exist and treated that as a countervailing factor in the planning balance.

This is likely to influence future litigation in two ways:

• Error-of-fact challenges will face a steep materiality hurdle where the decision-maker has already recognised uncertainty in the underlying factual premise (here: the incomplete site selection picture).
• Officer report challenges will turn heavily on transparency: candidly acknowledging evidential gaps can inoculate a permission against later “missing information” attacks, provided members were alerted to the gap’s planning relevance.

5) Complex Concepts Simplified

• “Material consideration”: a factor the planning authority must consider if it is legally mandatory, or may consider if relevant. Weight is usually for the authority, not the court.
• Section 38(6) (the “plan-led” rule): decisions must be made in accordance with the development plan unless other material considerations indicate otherwise.
• National Landscape (formerly AONB): a protected landscape designation. Policies often set elevated tests for harmful development (including “no less harmful alternative site” requirements).
• Wednesbury rationality: a court will intervene only if the decision is so unreasonable that no reasonable authority could have made it.
• “Tameside” style challenge: an argument that the authority failed to take reasonable steps to inform itself before deciding; still deferential where the authority has recognised uncertainties and decided nonetheless.
• Error of fact (E v Secretary of State for the Home Department): only certain factual mistakes are legally actionable—especially where they are objectively verifiable, not the claimant’s fault, and material to the reasoning.
• Officer report “materially misleading” (Mansell v Tonbridge and Malling Borough Council): a permission is vulnerable if members were significantly misdirected on something that could have changed the outcome; minor errors or omissions are tolerated.

6) Conclusion

[2026] EWCA Civ 541 confirms that where a development plan policy (here, Policy EN1) makes alternative sites a mandatory issue, the legal question on judicial review is not whether the authority identified every plausible alternative, but whether it lawfully confronted the alternatives issue in substance. A later-emerging “missed” site will not be material if the committee granted permission while expressly recognising that other outside-designation alternatives might exist and treating that uncertainty as a factor against permission in the planning balance.