Journalistic sources and the law: blowing the whistle on truth-tellers | Editorial

When this newspaper spent two years uncovering the phone-hacking scandal at the News of the World, we were faced with a particularly powerful obstacle in the shape of the senior ranks of the Metropolitan police who repeatedly told the press, public and parliament that our stories were wrong.

http://www.guardian.co.uk/commentisfree/2013/feb/17/journalistic-sources-law-editorial