The Yatton Decision
The Yatton Decision: why this High Court ruling matters to flood-risk communities across the UK.
The National Flood Forum is highlighting the voices of residents living by a development of new homes in Yatton, North Somerset, in a new campaign film.
Residents are hugely concerned about a High Court ruling for new houses to be built on an area at high risk of flooding – despite failing a vital test.
We are deeply concerned about the ruling, the potential precent it sets, and the hundreds of people in Yatton facing the very real threat of increased flood risk and what this could mean for their homes and livelihoods. Residents worry that increased flood risk could leave their homes un-mortgageable, unsellable and ultimately worth far less to their families in the future. For people who have spent decades building their lives and financial security around their homes, this uncertainty is deeply distressing.
What has happened in Yatton?
The case concerns land on the edge of Yatton and the proposal by a large commercial housebuilder to build 190 new homes.
The site in question is in "Flood Zone 3a", which represents a high probability of flooding. The proposal went to a planning inquiry, and in March 2025, an independent planning inspector allowed the appeal and granted outline planning permission.
An important part of the case was the flood risk sequential test. The purpose of the sequential test is to ensure new developments should, wherever possible, be in areas with the lowest risk of flooding. The inspector considered potential alternative sites and concluded that 12 smaller sites, which the proposed homes would be spread across, were sequentially preferable to the Yatton site in question. As a result, the proposal did not pass the sequential test.
The Environment Agency also raised concerns about flood risk, while North Somerset Council argued that the development would not adequately mitigate flood risk and could increase risk to neighbouring properties. North Somerset Council subsequently challenged the inspector’s decision in the High Court. In June 2026, Mrs Justice Jefford dismissed that challenge.
What did the High Court decide?
The High Court did not decide that flood risk does not matter, nor did it say that every development which fails the sequential test should be approved. Instead, the judgment concerned what happens after a proposal has failed the sequential test.
The Court accepted that the inspector had been entitled to consider other material considerations when reaching the overall planning decision. These included whether the development could be made safe for its lifetime, whether it would increase flood risk elsewhere, and the wider economic, social and environmental benefits of the proposal.
In other words, a failure of the sequential test was not treated as an automatic legal veto. That distinction is important. The sequential test remains part of national planning policy and remains intended to steer development towards areas at lower flood risk. But the Yatton judgment confirms that failing it does not necessarily bring the planning decision to an end.
Why does this matter beyond Yatton?
The Yatton case provides an important potential precedent about how decision makers can approach flood risk when balancing competing planning considerations. This matters because planning decisions made today can determine flood risk for future generations. The 2026 National Planning policy Framework (NPPF) allows development even if it fails the sequential and exemption test if it can show that potential benefits are “likely to be substantially outweighed by adverse effects”.
The Yatton inquiry considered whether the development would increase flood risk elsewhere. The inspector ultimately concluded that it would not, and the High Court found that there was a rational basis for that conclusion. But the experience of communities affected by flooding tells us that flood risk is not simply a technical calculation on a planning application.
People understand their local drainage systems, watercourses, roads and fields. They know where water collects, where access becomes difficult and what happens when infrastructure is overwhelmed. That local knowledge should not be an afterthought in planning decisions.
What about climate change?
Flood risk assessments necessarily look into the future, but the future is uncertain. Climate change is expected to alter rainfall patterns, river flows, sea levels and coastal flood risk.
The Yatton inspector considered climate change allowances and residual risks, including the possibility of defences being breached or overtopped in an extreme event. He concluded that the proposed development could be made safe for its lifetime, subject to mitigation and a Flood Management Plan. The High Court upheld that reasoning.
For us, this reinforces the need for planning policy and practice to remain firmly focused on long-term resilience, rather than simply whether a development can meet a particular design standard today.
What should happen next?
The Yatton case should prompt a serious conversation about whether the current planning framework provides the level of certainty that flood-risk communities need and creates case law (just like the ones it cites) that could be used in future decisions.
Development should be directed towards areas of lower flood risk wherever reasonably possible.
A failed sequential test should not become something that can routinely be overcome through a general balancing exercise.
The impact on existing communities must be properly understood. Planning decisions must consider and be informed by the consequences for people living nearby.
Climate change and residual risk must be treated as long-term issues.
The Yatton decision is a warning to get the balance right
The Yatton judgment is a legal decision about one planning application. It does not mean that all development on floodplains will now be permitted.
If we are serious about creating resilient communities and reducing future flood risk, we need a planning system that consistently puts people in the safest possible locations and gives proper weight to the experience of those already living with flooding. The 2026 rulings include notes on inclusion of evacuation plans and PFR as part of the planning application.
We will continue to advocate for a planning system in which flood risk is not treated as an obstacle, but as a fundamental consideration in deciding where and how we build.
We know that new, affordable homes are desperately needed in the UK. But where we build them matters, otherwise we are storing up significant issues for the future.
Media contact Ben Hennessy: 07549 870 916 email: ben.hennessy@floodforum.org.uk
