Britain can still make a difference in Syria, Labour leader Ed Miliband wrote today after he voted against the Government's motion on the principle of military intervention in the country.
Writing in the Guardian, Mr Miliband said the UK's global position lies in a "hard-headed multilateralism".
He added: "We must use next week's G20 meeting in Russia, with the eyes of the world on Syria, to seek to bring the international community together, and force the warring parties into the political solution that is necessary.
"But the vote remains an important moment: for parliament, for the country and for Britain's relations with the world.
"This moment also gives us the opportunity to learn the right lessons for the conduct of foreign policy across all parties".