The Syrian National Coalition meet Foreign Secretary William Hague, declaring a "coalition of the willing" are ready to launch strikes against President Assad
Leaders of the Syrian opposition have met Foreign Secretary William Hague as the UK continues to push for a political solution to the bloody conflict.
UK involvement in a military coalition was ruled out after Prime Minister David Cameron suffered a surprise defeat in the Commons last week but the Syrian opposition said Britain still had an important role to play in providing aid.
The Syrian National Coalition’s Monzer Akbik said other countries would form a "coalition of the willing" to launch strikes against Assad even without the UK's involvement.
"The massacres and the crimes against humanity taking place in Syria (are) escalating more and more, by the war machine of the regime," he told BBC2's Newsnight.
"There is a priority now for the International community, east and west, to take measures in order to paralyse the ability of the war machine of the regime to kill.
"We believe there is no other choice for the international community to assume the responsibility, the legal responsibility, ethical and humanitarian responsibility, to end the massacres in Syria by using force against the regime.
"Regarding the UK there are many other things to talk about. There are other countries that are going to be in the coalition of the willing."
Meanwhile, tensions over Syria are expected to dominate a summit of the world's major economies held in Russia - days before an expected US military assault on the Assad regime, which host Vladimir Putin has warned would be an act of aggression.
The Prime Minister has said he will make the case at the G20 for a robust international response to the use of chemical weapons.
Similarly, President Obama's hopes of winning political support in Washington for a strike against Assad were given a boost after a Senate panel voted to give him the authority to use military force against Syria.
The vote in the Senate Foreign Relations Committee was the first in a series as the president's request makes its way through congressional panels before coming before the two chambers of Congress for a final vote.