North Somerset District Council v Secretary of State for Housing, Communities and Local Government & Persimmon Homes Severn Valley [2026] EWHC 1430 (Admin)
North Somerset flood sequential test is an important Planning Court judgment on what follows when a proposal does not pass the flood-risk Sequential Test.
The court held that failure of the policy test did not create an automatic legal veto on planning permission. The decision-maker still had to determine the application in accordance with the development plan unless material considerations indicated otherwise, and could weigh relevant sustainability and flood-safety considerations in the overall planning balance.
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- Neutral citation
- [2026] EWHC 1430 (Admin)
- Court
- High Court, King's Bench Division, Planning Court
- Judgment date
- 12th June 2026
- Judge
- Mrs Justice Jefford
- Case number
- AC-2025-CDF-000169
What North Somerset decided
The case arose from an appeal concerning outline planning permission for 190 homes and associated development at Rectory Farm North, Chescombe Road, Yatton.
North Somerset District Council challenged the Secretary of State’s appeal decision under section 288 of the Town and Country Planning Act 1990. Its principal complaint was that the Inspector had mishandled national flood-risk policy after concluding that the proposal did not pass the Sequential Test.
Mrs Justice Jefford dismissed the challenge.
Failing the Sequential Test was not an automatic legal veto
The council argued, in substance, that once the proposal failed the Sequential Test the policy consequence should have ended the matter.
The court rejected that approach. National policy is an important material consideration, but it does not displace the statutory decision-making framework. A conflict with flood-risk policy can carry substantial weight without becoming an absolute rule that planning permission can never be granted.
The decision-maker still has to carry out the planning balance required by the development plan and other material considerations.
The Inspector had not secretly applied the Exception Test
The Inspector went on to consider matters including the sustainability benefits of the development and whether the scheme would be safe for its lifetime.
North Somerset argued that this effectively amounted to applying the Exception Test after the Sequential Test had failed.
The court disagreed. Those matters were capable of being material considerations in their own right. The fact that similar considerations appear within the policy framework for the Exception Test did not prevent the Inspector taking them into account in the overall planning balance.
Flood safety remained a material consideration
The court also rejected the challenge to the Inspector’s conclusion that the development could be made safe for its lifetime.
The assessment of flood evidence was a matter of planning judgment. The Inspector had addressed the relevant material and explained why the proposed mitigation and design response were sufficient for the conclusion reached.
The statutory planning balance still governs
North Somerset is a useful reminder that planning policy is applied through the statutory system rather than as a collection of free-standing legal prohibitions.
A decision-maker who departs from an important national policy will need to understand the policy correctly, acknowledge the conflict and give rational reasons for the weight and conclusion. But the mere existence of policy conflict does not necessarily remove the power to grant permission.
Use the case carefully with the current NPPF
The judgment concerned the national policy wording applicable to the appeal before the court. Flood-risk policy has since been revised, so the current National Planning Policy Framework and Planning Practice Guidance should always be checked before applying the case to a new proposal.
Planning Geek’s current Flood Risk Assessment guide explains the Sequential and Exception Tests under the present policy framework.
Why North Somerset matters in practice
The decision is most useful where a refusal or appeal turns on the relationship between a failed policy test and the wider planning balance.
It does not make a failed Sequential Test unimportant. It confirms instead that the decision-maker must identify the conflict, understand its policy significance and then lawfully assess all material considerations before reaching the final decision.
Read the full North Somerset judgment
The full Planning Court judgment is held in the Planning Geek case law library. Gold Members can open the protected PDF below.
North Somerset Flood Sequential Test Case Law Page Updated: 10th September 2026