Document also outlines how David Trimble told government that people in both unionism and nationalism were too tolerant of criminality but the effect was 'corrosive' Major gangster Thomas 'Slab' Murphy was on the IRA Army Council in 2002, according to a previously secret Downing Street file - with both British and US officials repeatedly speaking of him by name. Files opened at The National Archives in Kew show how Britain kept close watch on the makeup of the IRA's key body,