The former head of the UN monitoring mission in Syria, Maj Gen Robert Mood has rarely spoken of his experience or his prognosis for Syria's future since he left the country.

As the conflict in the country has deepened, and with tens of thousands of people killed, the Norwegian told Stephen Sackur it is time for the international community to consider imposing a no-fly zone in the country to "level the playing field" for the rebels.

You can watch this programme on BBC World at 1430, 2230 GMT on Wednesday 27 March and on BBC News Channel at 0030 on Thursday 28 March 2013.

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