What role will Free Syrian Army play in IS fight?

A Free Syrian Army spokesman has said that they are the west's "best partners on the ground in Syria".

British RAF Tornado jets have carried out their first air strikes against so-called Islamic State in Syria, the Ministry of Defence has confirmed.

Prime Minister David Cameron has claimed that 70,000 moderation opposition fighters in Syria will complement the coalition. Critics say the number is far fewer and they are not a united force.

Mark Lowen reports.