Businessman Denis O’Brien wants the courts to “clearly demarcate” the powers of the Oireachtas and courts in his “unique” action over Dáil statements by two TDs about his banking affairs, the High Court has heard.

RULES governing the Dáil are to be strengthened so TDs will be suspended from the House if they resort to the expletive-laden language used by Green deputy Paul Gogarty last week.