Roy Greenslade presents this four-part documentary series on the freedom of press.
Part Four: Established democracies
What is the story of press freedom in established democracies?
What is getting in the way of editorial integrity in societies which apparently have freedom of the press?
In the final part of the series, we hear from Michael Wolff, biographer of News Corp's Rupert Murdoch; former editor of the Los Angeles Times, Dean Baquet; and Dan Gillmor of the Centre for Citizen Media.