Latest update is quoting the Captain as saying there was "some sort of object" found on the plane that was sufficiently of concern for him to turn around the plane.
Apparently everyone will fly out tomorrow 11.30am.
Air Traffic Control still calling it on 7pm news just now as a "non specific threat". 246 pax and 18 crew.
Governmment sources say there was a note alluding to a bomb threat found on board.