The Prime Minister has said that a UN resolution laying out a timetable for the destruction of Syria's chemical weapons stockpile would "test" Russia's resolve to follow through.
Mr Cameron told a panel of senior MPs at the House of Commons Liaison Committee: "If we can achieve the removal and the destruction of the biggest chemical weapons arsenal in the world, that would be a significant step forward".
But he voiced his earlier concerns that the proposal could be a "delaying tactic" and that any plan for disarmament must include a timetable and "consequences" if this was not kept to.
More top news
An Australian grandfather has been hailed for his "fantastic survival skills" after keeping himself alive in the bush by eating ants.
A man who was never expected to be able to get out of a wheelchair has shared his first dance with his wife.
Sitting down is no worse for you than standing up as long as you take regular exercise, according to a study.