It began with the discovery that thousands of people had been victims of tabloid journalists accessing their mobile phones in pursuit of stories.
Operation Weeting, the investigation into phone hacking at the former News of the World headquarters, cost Scotland Yard £23 million.
Now the Crown Prosecution has ended the investigation, charges of Corporate Liability against Rupert Murdoch's media empire and former journalists at The Mirror will not be brought.
ITV News Correspondent Paul Davies reports:
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