Leader of the Syrian opposition Moaz al-Khatib, who threatened to boycott talks with US Secretary of State John Kerry, heads a deeply divided and largely ineffective political opposition.
He urged President Bashar al-Assad to go, he said: "Behave for once in your life as a human being, make one reasonable decision in your lifetime."
As Mr Kerry and Mr al-Khatib leave the open meeting, a protester raises a sign in front of them saying, "USA, EU, Saudi support terrorists."
More top news
Five members of the Armed Forces have been granted operational honours and awards in recognition of their service.
The Conservative peer said he was 'shocked' that the law had been vetoed by the Liberal Democrats.