R (Luton and District Association for the Control of Aircraft Noise) v Secretary of State for Transport [2026] EWCA Civ 648
Luton [2026] is an important procedural warning for challenges involving nationally significant infrastructure projects.
The Court of Appeal did not determine the substantive climate and EIA grounds arising from the earlier Luton Airport judgment. Instead, it refused an extension of time because the appellant had missed the special seven-day deadline for filing its appellant’s notice.
Important legal note: Planning Geek is a planning consultancy, not a law firm. This page provides general planning information and is not legal advice. Case law must be read in its factual and legal context and may be affected by later judgments, legislation or policy. Where the original judgment is available, it remains the authoritative source. If the outcome matters to a live case or dispute, take advice from an appropriately qualified planning solicitor or barrister.
Copyright and licensing: Crown copyright and other rights in judgments and source material remain with the relevant rights holders. Where a judgment is reproduced from Find Case Law, it is used under the Open Justice Licence and the source should be acknowledged. Material obtained from other sources is reproduced only where the applicable terms permit it. Planning Geek does not claim copyright in the text of court judgments.
- Neutral citation
- [2026] EWCA Civ 648
- Court
- Court of Appeal (Civil Division)
- Judgment date
- 21st May 2026
- Judge
- Bean LJ, Lewison LJ and Holgate LJ
- Case number
- CA-2025-003267
NSIP appeals have a seven-day deadline
Practice Direction 52D paragraph 17.3 came into force on 1st October 2025. For an appeal in a nationally significant infrastructure project case, the appellant’s notice must be filed within seven days of the decision being appealed.
The rule forms part of a wider package intended to accelerate legal challenges to Development Consent Orders and make the timetable for NSIP litigation more predictable.
The appellant used the ordinary timetable instead
Lang J dismissed the High Court challenge and refused permission to appeal on 8th December 2025. The seven-day deadline therefore expired on 15th December 2025.
The appellant’s notice was not filed until 24th December. It initially asserted that it was in time and did not contain the required application for an extension. The extension application was eventually made on 22nd January 2026, nearly six weeks after the deadline had expired.
Missing the deadline was serious and significant
The Court applied the three-stage approach in Hysaj and Denton. The breach was accepted to be serious and significant, and there was no good reason for it.
Overlooking a deadline, or being unaware of a new time limit, is not normally a good reason. That was particularly so where the party was represented by a specialist legal team and the changes had been published with a two-month lead-in period.
The purpose of the accelerated NSIP regime mattered
The Court placed particular weight on the policy behind the new timetable. The Planning Act 2008 regime, the Planning and Infrastructure Act 2025 reforms and the amended practice direction were all designed to reduce delay and uncertainty around nationally significant infrastructure projects.
Delay in this context is not judged only by whether construction has physically started. Uncertainty can itself disrupt administration, investment, monitoring, project preparation and the court’s ability to meet its own target dates.
Public interest did not rescue the late appeal
The appellant argued that the proposed appeal raised important public questions affecting other NSIPs. The Court accepted that public interest can be relevant at the third stage, but it is not an independent compelling reason for extending time.
NSIP challenges will often raise issues of public importance. If similar points arise elsewhere they can be determined in another properly timed challenge.
The Court did not decide the substantive Finch arguments
The Court heard short submissions on the proposed grounds only because the appellant argued that they were obviously strong. It concluded that Lang J’s judgment was cogent and comprehensive and that there was no obvious flaw. The merits were therefore not sufficiently clear to affect the extension decision.
The extension of time was refused and, as a consequence, permission to appeal was also refused. The substantive climate-law issues were not decided by the Court of Appeal.
Why Luton [2026] matters
The practical lesson is stark: in an NSIP case, do not assume the normal 21-day appeal period applies. The specific seven-day deadline in PD52D must be checked immediately when a Planning Court judgment is handed down.
Read the full Court of Appeal judgment
Planning Geek holds the approved Court of Appeal judgment in the protected case law library. Gold Members can open the PDF below.
Luton NSIP Appeal Deadline Case Law Page Updated: 11th September 2026