David Grimason, whose two-year-old son Alistair was killed almost 10 years ago, is preparing to return to the United Nations in New York ahead of discussions on an arms trade treaty resuming on Monday.

Mr Grimason, 41, attended similar talks at the UN last July but officials were unable to reach an agreement.

Yesterday, he said: "The UN must deliver this treaty – far too many lives are lost every year and their inaction will simply lead to more unnecessary deaths."

Mr Grimason, who now lives in Aberdeen, has been campaigning for tighter controls on the trade of weapons since his son was killed during a gunfight at a cafe in the seaside village of Foca in July 2003.