Following a High Court ruling, telecoms billionaire Denis O’Brien will not be allowed rely on the defences of truth and honest opinion in a defamation action brought against him by two Northern Irish lawyers. Darragh Mackin and Gavin Booth, then of KRW Law in Belfast are suing the Digicel chief and his PR advisor James Morrissey for damages arising out of a press release they issued in response to a 2016 report on the concentration of media ownership in Ireland, that was critical of O’Brien. At the time of the report, commissioned by then Sinn Fein MEP Lynn Boylan, the 63-year-old…