As Lord Justice Leveson puts the finishing touches to his forthcoming report into the culture, practices and ethics of the press we speak to a former Editor of The Guardian Peter Preston and the academic Professor Natalie Fenton about why the FT and The Guardian - both previously open to the idea that legislation might be needed to tempt, or force, reluctant media owners to participate, have moderated their positionsWe celebrate thirty years of Channel 4 with the founding Chief Executive Sir Jeremy Isaacs and look back at its achievements and the challenges it faces in the future. And we try to get to the bottom of why the BBC - so long immune from bad ratings on the trust scorecard appears to be suffering too. 76% of us apparently do not trust senior managers at the BBC to tell the truth.Presenter Steve Hewlett Producer Beverley Purcell.