ABOUT THIS SITE
Only Glass Walls is an open-data platform mapping every known intensive animal agriculture facility in the UK — 68,000+ farms, slaughterhouses, and processing plants — alongside live environmental pollution incidents, real-time flood warnings, and a running count of animals killed since you opened the page.
Factory farming depends on secrecy. We're ending that. All data on this site is sourced from UK government registers (Defra, FSA, Environment Agency) and is freely available to the public. We simply make it visible.
DATA SOURCES
All statistics, farm locations, and environmental data on this site are drawn from official UK government sources. No estimates or projections are used without clear attribution.
Defra — June Agricultural Census
Annual census of UK livestock numbers, farm types, and land use. Primary source for all animal population figures on this site.
GOVERNMENTFood Standards Agency — Slaughter Statistics
Quarterly and annual data on the number of animals slaughtered in approved UK abattoirs, broken down by species.
GOVERNMENTEnvironment Agency — Pollution Incidents Register
National Incident Recording System (NIRS2) — Category 1 and 2 pollution incidents including agricultural and sewage sources.
LIVE APIEnvironment Agency — Flood Monitoring API
Live flood warnings and alerts across England, updated every 15 minutes. Used for the live EA layer on the map.
GOVERNMENTCEFAS / Marine Scotland — Aquaculture Survey
Annual survey of UK fish farm production, species breakdown, and tonnage. Source for fish farm data on this site.
GOVERNMENTFSA — Approved Establishments Register
Official register of all approved slaughterhouses, cutting plants, and cold stores in England, Wales, and Scotland.
CAMPAIGN ORGANISATIONS
These organisations are working to expose and end factory farming, protect UK waterways, and advocate for animals. Support their work.
Project Slingshot
Global network of citizens, designers, investigators, and filmmakers exposing factory farming through data, storytelling, and direct action.
NGOCompassion in World Farming
Leading farm animal welfare organisation. Campaigns for an end to factory farming through advocacy, corporate engagement, and public education.
NGOAnimal Aid
UK-based animal rights organisation campaigning against all forms of animal abuse, including factory farming, slaughter, and live export.
CAMPAIGNViva!
UK vegan campaigning charity that investigates factory farms, exposes conditions, and campaigns for a plant-based food system.
NGOThe Humane League UK
Campaigns to end the abuse of animals raised for food through corporate outreach, grassroots activism, and public pressure.
ENVIRONMENTSurfers Against Sewage
Environmental charity campaigning against sewage pollution in UK rivers and coastal waters, much of which originates from agricultural runoff.
ENVIRONMENTRiver Action
Campaigns to clean up UK rivers polluted by agricultural runoff, sewage, and industrial waste. Focuses on the River Wye and Thames.
ENVIRONMENTFriends of the Earth
Environmental campaigning organisation. Runs campaigns on factory farming's impact on climate, nature, and water quality.
SHARE THIS SITE
The most powerful thing you can do is share this map. Every person who sees it is one more person who can no longer claim ignorance.
Direct link: https://onlyglasswalls.com
OPEN DATA
All data powering this site is derived from public government sources and is freely available under the Open Government Licence. If you are a journalist, researcher, or campaigner who needs access to the raw dataset, get in touch.
68,631 locations · 579 slaughterhouses · 40 live pollution incidents · EA flood warnings refreshed every 5 minutes