George Osborne has made it clear the government will only call a vote on UK military intervention in Syria when it is "confident" it has enough support to win the vote but uncertainty surrounds how MPs from other party's may vote.
The question now is whether or not the Labour party will let its members have a "free vote" over whether to bomb Syria.
ITV Political Correspondent Carl Dinnen reports:
David Cameron has revealed he will "make the case" for Britain to join its allies in tackling Islamic State in Syria, instead of just Iraq.
The Chancellor has said the government will only call a vote on UK military action in Syria when it is "confident that we are going to win".
Labour's shadow chancellor has said the notion of any UK intervention in the Syria conflict has to be looked at in a "very considered way".