Guardian: McLibel leaflet was cowritten by undercover police
McDonald's sued green activists in long-running David v Goliath legal battle, but police role only now exposed
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 giant millions of pounds in fees.
The true identity of one o…


