The Prime Minister has admitted he wants to persuade the public that expanding the fight against Islamic State militants into Syria is both legal and appropriate.

British jets are yet to carry out an attack on I.S. targets in Iraq after their first combat mission ended without any bombs being dropped.

Meanwhile, the US says it carried out more airstrikes in Syria yesterday.

But Lieutenant Colonel Chris Parker - who was involved in the second Gulf War - is among those questioning whether hitting from above is enough: