Speaking at the end of the G20 discussions, British Prime Minister David Cameron, also outlined the need to act without the backing of the UN security council.
Warning that "everyone will pay the price over Syria" as other regimes may now conclude that they can use weapons of mass destruction to "massacre" their civilians with impunity, he argued that there was a case for intervention without the United Nations Security Council's backing stating,
“ strong legal advice is that there is a responsibility to protect- a case for humanitarian intervention because you are preventing a humanitarian catastrophe.”
“There was an argument from some that unless it is self-defence or unless there is a Security Council resolution there is no legal basis for taking action. I don’t think that is the case. I think it is a very dangerous doctrine.”
“If you accept that, you could have a country massacring half its people, a blockage at the UN security Council and no-one could act.”