Ex-undercover police officer exposes how force infiltrates campaign groups

A fascinating look into the methods used by the police to infiltrate campaigns in Britain in this weekend's Guardian:

Undercover policeman reveals how he infiltrated UK's violent activists

For four years, Officer A lived a secret life among anti-racist activists as they fought brutal battles with the police and the BNP. Here he tells of the terrifying life he led, the psychological burden it placed on him and his growing fears that the work of his unit could threaten legitimate protest... (read more on the Guardian website).