Guardian / Observer: Undercover officer spied on green activists

Guardian investigation reveals details of PC Mark Kennedy's infiltration of dozens of protest groups

A police officer who for seven years lived deep undercover at the heart of the environmental protest movement, travelling to 22 countries gleaning information and playing a frontline role in some of the most high-profile confrontations, has quit the Met, telling his friends that what he did was wrong.

PC Mark Kennedy, a Metropolitan police officer, infiltrated dozens of protest groups including anti-racist campaigners and anarchists, a Guardian investigation reveals.

Legal documents suggest Kennedy's activities went beyond those of a passive spy, prompting activists to ask whether his role in organising and helping to fund protests meant he turned into an agent provocateur.