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.
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The video, obtained by ITV News, shows scores of migrants desperately trying to board lorries in a restricted area within the tunnel.
Ex-Spitfire pilot Allan Scott, 94, said he was told off by the Queen when he first met her in 1943 when she was just 16.
Last minute preparations are going on at the Church of St Mary Magdalene where Princess Charlotte will be christened.