Guardian: 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. The true identity of one of the authors of the "McLibel leaflet" is Bob Lambert, a police officer who used the alias Bob Robinson in his five years infiltrating the London Greenpeace group, is revealed in a new book about undercover policing...