High Court finds Natural England failed to protect Catfield Fen

The story in brief

What you need to know

• The judgment, handed down on 9 October 2026 in R (Harris) v Natural England, found breaches of regulation 9(1) of the Conservation of Habitats and Species Regulations 2017 and article 6(2) of the Habitats Directive.1
• The judge found evidence that nutrient pollution was entering the fen from agricultural land to the north, through Fenside and drainage grips. On that evidence, Natural England was required to take active steps to protect the Special Area of Conservation.1
• The decision does not mean Natural England was automatically in breach as soon as pollution risks were reported. The judge accepted that the regulator could investigate and choose suitable measures, but found its later response insufficient.12
• The ruling is an accountability outcome, not a finding that the whole fen is demonstrably deteriorating. Monitoring recorded elevated phosphate readings, while also describing levels across much of the site as relatively stable or moderately declining.1
• The judgment leaves the practical response open. The court did not set out protective measures, and any further orders were left for later submissions.12

Conservation context

Why this matters

The case clarifies that a regulator’s discretion to investigate and select a response does not remove its duty to take active protective steps when evidence shows a risk to a protected site. It also underlines that a legal finding alone does not establish that ecological pressures have been resolved.12

The developing story

What happens next

Natural England’s response and any further court orders remain to be settled. The key practical questions are what action the regulator will take and whether subsequent monitoring shows reduced nutrient inputs and improved ecological condition at the fen.13

Established evidence

What we know

• The High Court found Natural England breached regulation 9(1) of the 2017 Habitats Regulations and article 6(2) of the Habitats Directive.1
• The judgment identified a pollution pathway from agricultural land north of the fen, via Fenside and drainage grips.1
• Natural England’s monitoring recorded phosphate above the relevant target, including elevated readings at the fen’s northern edge.1
• The Guardian reported that Natural England accepted the court’s verdict that it had not done enough to protect the fen, while declining to comment on ongoing proceedings.3

Open questions

What we don't know

• The specific protective measures Natural England will take have not been set out in the judgment.12
• It is not yet clear whether the court will make further orders after later submissions.12
• The reporting does not establish whether nutrient inputs will fall or the fen’s ecological condition will improve.1
• The sources do not establish how the ruling will affect regulators’ responses to diffuse agricultural pollution at other protected sites.12

Source coverage

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