David Cameron and Barack Obama have spoken via telephone about the global refugee crisis and the ongoing conflict in Syria, the White House has said in a statement.
Mr Obama and Mr Cameron reaffirmed their commitment to defeat the so-called Islamic State, reach a political transition to end the conflict in Syria and the need to focus on climate change ahead of the upcoming international conference in Paris.
With just 10 weeks to go until the Scottish vote on independence, David Cameron visited Scotland to appeal for a 'United Kingdom'.
Debi Edwards, ITV News Scotland correspondent, reports from both sides of the campaign:
UK Ambassador to the UN Sir Mark Lyall Grant has explained why Britain abstained on the vote on granting Palestine upgraded status at the UN:
David Cameron said he wanted to make it "absolutely clear" to the Argentine President that Falkland Islanders "have decided to hold a referendum about their future and if she believes in democracy, if she believes in self-determination, she should respect the outcome of that referendum".
Downing Street aides said the David Cameron sought out Ms Kirchner to make Britain's position on the Falklands clear.
Aides said Mr Cameron gave a "clear and calm message" which he repeated three times as his words were interpreted into Spanish.
Ms Kirchner was said to have responded with "ramblings" as she tried to hand the PM a package marked "UN - Malvinas", but Mr Cameron walked away.
Images released by the Argentinian Government show David Cameron in conversation with Argentine President Kirchner, apparently discussing the Falkland Islands.
The Argentine President tried to hand David Cameron an envelope which contained a letter outlining the UN resolution on the Falklands, according to the Argentinian Presidency website.
UK officials have described Argentine President Kirchner as "rambling" in meeting with the Prime Minister. The document she was brandishing said "UN and Malvinas".
David Cameron has refused to accept a letter from Cristina Fernández de Kirchner at the G20 meeting in Mexico.
The Argentinian President attempted to put a letter into Cameron's hands but he refused to accept it with Number 10 saying he thought it was a stunt.