Wrotham Parish Council v Secretary of State for Housing, Communities and Local Government & Ors

The Planning Court’s judgment in Wrotham is the first substantive High Court decision to interpret the new Grey Belt policy introduced in the December 2024 NPPF.

It is not just a legal clarification,it is a statement about how Green Belt decision-making is intended to operate going forward.

For those of us advising on strategic land, regeneration and infrastructure, this case provides early judicial direction on what Grey Belt really means in practice — and how it should be approached.

The Core Question: What Is Grey Belt Testing Actually About?

The key issue before the Court was deceptively technical:

When deciding whether land qualifies as “Grey Belt”, should decision-makers consider whether footnote 7 policies (heritage, National Landscapes, flood risk, etc.) provide a strong reason to refuse development generally on the land, or the specific development proposed?

The Court’s answer was clear.

In decision-taking, the assessment is proposal-based. Inspectors are entitled to assess whether footnote 7 policies provide a strong reason to refuse the development applied for, not some hypothetical future scheme.

That clarification matters enormously.

Had the claimant’s interpretation succeeded, Grey Belt could have become an abstract, site-status exercise detached from the realities of development control. Instead, the Court anchored the test firmly in real-world decision-making.

The Court also confirmed that the requirement of Paragraph 155(b) is to establish need to the type of development proposed, not each element of the proposal separately. This interpretation makes it easier for applicants because it prevents planning authorities from forcing them to prove the need for every minor component. The focus stays on whether the main development type is needed.  

For example if someone proposes a solar farm with:

• panels
• access tracks
• an inverter station
• a substation

They only need to show the need for a solar farm overall. They don’t have to provide a separate need case for the access tracks, the inverter, the substation, etc.

Grey Belt Is a Policy Shift

The judgment recognises the purpose behind paragraph 155 of the NPPF: to create a structured route for releasing certain Green Belt land where it:

• Does not strongly contribute to Green Belt purposes;
• Is not subject to a strong refusal reason under footnote 7;
• Meets demonstrable unmet need; and
• Is in a sustainable location.

The Court accepted that this was a permissive policy change intended to enable appropriate development on lower-performing Green Belt land.

This is important strategically.

Grey Belt is not simply “Green Belt with another hurdle”. It is a policy mechanism designed to avoid defaulting back to the very special circumstances test where the paragraph 155 criteria are satisfied.

For promoters, this creates a clearer evidential structure.

For local authorities, it requires careful and disciplined policy application.

For Inspectors, it provides a defined analytical pathway.

The Wider Signal: Resist Over-Legalising the NPPF

The Court reiterated something we often remind clients of. Planning policy is not a statute. It should not be dissected in isolation from its purpose and context.

The claimant’s argument relied heavily on the absence of the word “the” before “development” in the Grey Belt definition. The Court rejected that forensic approach, emphasising that policy interpretation must be practical and contextual.

That is a helpful reminder. The planning system works when policy is applied with realism and planning judgement.

What This Means for 2026 and Beyond

In practical terms, Wrotham gives us early clarity on three fronts:

• Grey Belt is assessed against the development proposed at decision stage. This avoids speculative exercises about hypothetical schemes.
• Footnote 7 remains powerful, but not absolute. A “strong reason for refusal” must genuinely arise from the specific proposal.
• Evidence and structure are critical.

Grey Belt arguments will succeed or fail on disciplined assessment of Green Belt purposes, footnote 7 impacts, demonstrable need and sustainability.

At Eden, we are already seeing Grey Belt being raised in appeals, call-ins and emerging site strategies. The Wrotham judgment provides a framework that will shape those discussions.

Grey Belt represents one of the most significant Green Belt policy adjustments in a generation.

Wrotham confirms that it is intended to operate as a meaningful release mechanism, not as a theoretical designation that collapses under scrutiny.

As ever in planning, the opportunity lies in:

• Rigorous evidence,
• Clear narrative, and
• Strategic positioning within the policy framework.

If you are promoting land within the Green Belt, or advising on decision-making under the new NPPF, now is the time to revisit strategy in light of this judgment.

The policy has shifted. The courts have spoken. The implications will play out across 2026.