Missing: FOIs reveal 25 million chickens are unaccounted for in England

Missing: FOIs reveal 25 million chickens are unaccounted for in England

Gap in poultry figures could have huge impacts on river pollution and land use say The Wildlife Trusts

A new report published today by The Wildlife Trusts has unearthed significant inaccuracies in poultry data used to inform the Government’s policies on land, manure and pollution management in England. 

The report, Counting Chickens - An analysis of UK poultry numberssheds new light on the scale of the poultry sector in England, particularly in the chicken farming hotspots of Lincolnshire, Norfolk, Shropshire and Herefordshire. It follows numerous Freedom of Information requests (FOIs) and analysis of other official data sets which reveal major discrepancies in the number of chickens reportedly housed in the areas. (1)

The report shows that a highly significant number of chickens – at least 25 million birds – are currently missing from data used by Government departments in the four counties alone. If the scale of inaccuracy was mirrored at a UK level, it could mean over 67 million birds are currently unaccounted for. 

The Wildlife Trusts believe that misleading figures are being used to inform Government policies on land, the environment and river pollution, and may also affect decisions made about permits and planning permissions for additional poultry operations. This could lead to huge impacts on water pollution, nature and land use being ignored.  

For example, the report demonstrates that in failing to recognise the true scale of chicken farming in England an estimated 185,189 cubic metres (equivalent to 74 additional Olympic-sized swimming pools) of poultry manure currently goes unreported every year. This highly concentrated waste accumulates in the surrounding environment, including waterways, with pollutants such as nitrogen and phosphorous having negative impacts on both water quality and the wildlife that lives in rivers.

Vicki Hird, strategic lead on agriculture at The Wildlife Trusts says:

“The evidence is clear: Government decisions on poultry permits, and subsequent land use and pollution impacts, are based on misleading data. Our new research shows that in England alone, these inaccuracies could mean an undercounting of poultry by at least a third, with huge impacts on our natural world, as well as on the health of the rivers and waterways we all enjoy for bathing and drinking water.”

Left unchecked, industrial levels of poultry waste can have significant impacts on waterways such as the River Wye and Severn, where nitrates and phosphorus levels from manure have caused severe ecological decline and damaging impacts to wildlife populations including endangered Atlantic salmon. The increasing levels of land required, both in the UK and globally, to feed poultry also has significant environmental impacts, especially due to the large quantities of pesticides and fertilisers needed for feed production. 

These issues were highlighted in The Wildlife Trusts’ earlier report, Quantifying the Environmental Risks from Pig & Poultry Production in the UK, which showed how poultry production is highly concentrated, with more than half of England’s chickens in just 10 council areas/

The combined findings of both reports have led The Wildlife Trusts to call for:

  • An urgent data and policy review: Action must be taken to ensure data on the UK poultry flock in all four nations is accurate. A review of all poultry policies, regulations and measures – including any growth plans and planning rules and decisions at local level – must then work to ensure risk and harms are avoided, using correct figures to inform decisions.
  • Reform existing permitting regimes: Risk assessments and environmental permitting of intensive poultry units in the UK must be reformed. Units must be accurately assessed and permitted according to both their size and the wider environmental impacts of feed and excreta, especially in light of water pollution risks.
  • Food chain regulation: Ensure supply chains are regulated and incentivised to support farmers to transition to a less polluting and more integrated poultry system.

Vicki Hird continues:

“With discussions underway about both water reforms and the profitability of the poultry sector, it’s essential that the Government ensures accurate data is being used to inform policy changes and action. Alongside this, permitting rules must take the wider impact of poultry units on the environment into account, while farmers should also be supported to transition to less polluting practices. Only then will we have a poultry system which works for farmers, wildlife and for people long into the future.” 

Read Counting Chickens – an analysis of UK poultry numbers 

Editor's notes

  1. The findings reveal major differences in poultry data between Department for Environment, Food & Rural Affairs (Defra)’s annual survey and other statutory data providers, including the Environment Agency (EA) and Animal and Plant Health Agency (APHA). These agencies appear to contradict each other in their estimates of the number of birds across the four identified counties: the analysis revealed that Defra’s survey has bird numbers at 121% lower than Environment Agency permitting data, and over 150% lower than the Animal and Plant Health Agency (APHA) data. Possible reasons for these differences are explored within the report.
  2. Read the full report Counting Chickens – an analysis of UK poultry numbers here
  3. This report builds on an independent report, commissioned by The Wildlife Trusts in August 2025, which for the first time investigated the cumulative impact of the UK pig and poultry sector on the wider countryside: Quantifying the Environmental Risks from Pig & Poultry Production in the UK
  4. The Wildlife Trusts, alongside a coalition of over 40 environmental groups, are demanding immediate action to fix the UK's water systems through the #CleanWaterNow campaign. The recent Clean Water Now report highlights how  the upcoming Water Reform Bill must strictly limit pollution, tackle sewage, and restore nature: Clean Water Now: Environmental groups launch major new campaign ahead of Water Reform Bill
  5. The Government were elected on a manifesto that promised to ‘clean up our rivers’, whilst the Secretary of State for the Environment, Food and Rural Affairs pledged in July to reform farming support to ‘maximise benefits for the environment, particularly around water quality and biodiversity’ and to help farms, including poultry farms, to ‘transition to sustainable food production and to profitability. Ensuring the true scale of poultry production and the multiple environmental consequences of its industrial nature is recognised in efforts to achieve these aims is therefore critical.