Almost 4,000 residents, business owners and river users have joined a landmark legal claim accusing major poultry producers and a water company of widespread pollution across three of Britain’s most cherished rivers — the Wye, Lugg and Usk.
Filed at the High Court, the “no-win, no-fee” case is being described as the largest environmental lawsuit ever brought in the UK. It seeks compensation for alleged damage to property, livelihoods and public enjoyment, as well as an order to clean up the affected waterways.
The companies named in the claim — Avara Foods poultry group and Welsh Water (Dŵr Cymru) — robustly deny the allegations.
What’s the case about?
The claimants, represented by law firm Leigh Day, say years of intensive poultry farming and sewage discharges have caused “extensive and widespread pollution” in the Wye Valley and surrounding areas.
A mix of chicken manure, fertiliser run-off and sewage spills is blamed for choking the rivers with excess nutrients, turning once-clear waters green with algae and killing fish and other wildlife.
Environmental groups have long raised concerns that the Wye is being pushed to breaking point. It flows through protected landscapes, including Areas of Outstanding Natural Beauty, and supports rare species such as otters, Atlantic salmon and freshwater pearl mussels.
What are the claimants asking for?
Those bringing the case are seeking substantial damages and a court-ordered clean-up of the affected rivers. Many say their local businesses, homes and quality of life have suffered as water quality has declined.
- Some residents report being unable to swim, canoe or fish safely
- Others say their properties have lost value because of the pollution
- Campaigners argue the government and regulators have failed to act, leaving the courts as the “last avenue for justice.”
How are the companies responding?
Avara Foods, one of the UK’s largest poultry producers, said the case is based on a “misunderstanding” and that no manure is stored or spread on poultry-only farms that supply them. The company added that responsibility for fertiliser use lies with individual farmers and called for “solutions that address all forms of pollution and climate impacts.”
Welsh Water said it had spent more than £100m in recent years improving treatment works on the Wye and Usk and would “defend the case robustly”. As a not-for-profit, it argued that any payments to claimants would reduce funds for further environmental improvements.
Why it matters
If successful, this lawsuit could set a precedent for how polluters are held accountable and how compensation is awarded for environmental harm affecting local communities. It’s also a sign of a wider shift: when regulators fail to act, citizens are turning to collective legal action to seek justice.
