The wives of the British and German ambassadors to the United Nations have produced a video urging Syrian president Bashar al-Assad's wife to demand that her husband stop the violence in their country

Huberta von Voss-Wittig, wife of Germany's UN ambassador Peter Wittig, and Sheila Lyall Grant, wife of Britain's UN ambassador Mark Lyall Grant, said in a letter accompanying the video that Asma Assad's 'public voice is needed'