Rio Tinto was barracked by small shareholders and special interest groups at an annual meeting that marked a bad-tempered send-off for chairman Sir Robert...The mining group was attacked over pension issues, alleged safety problems in Utah and for not making provisions for a number of legal cases being taken out against it..."The [UK] government must change company law to ensure the directors of irresponsible companies like Rio Tinto are made fully liable and accountable for their destructive impact overseas," said Friends of the Earth campaigner Ed Matthew.