British Ambassador to the U.S. Sir Peter Westmacott tells CNN’s State of the Union with Candy Crowley his government is not currently considering adding to U.S. air power in Syria. On cooperation with the U.S.:
…we are in this together, and we need a joint operation to really push back against this barbaric behavior. We mean what we say on that.
However when questioned by Crowley on whether this could include British airstrikes:
It is not now contemplated.