"An undercover police officer posing for years as an environmental activist co-wrote a libellous leaflet that was highly critical of McDonald's, and which led to the longest civil trial in English history, costing the fast-food
“An undercover police officer posing for years as an environmental activist co-wrote a libellous leaflet that was highly critical of McDonald’s, and which led to the longest civil trial in English history, costing the fast-food chain millions of pounds in fees.”
Exclusive: McDonald’s sued green activists in long-running David v Goliath legal battle, but police role only now exposed (Guardian, link)