Block on Prince Charles's letters 'unlawful'
12 March 2014 Last updated at 20:20 GMT
The attorney general's refusal to let the public see letters the Prince of Wales wrote to UK ministers has been ruled unlawful by the Court of Appeal.
Guardian journalist Rob Evans had challenged Dominic Grieve's decision to veto a High Court tribunal ruling in favour of allowing their publication.
Mr Grieve has said he will appeal the latest ruling to the Supreme Court.
Nicholas Witchell reports.