From daily The Guardian in Britain today:
Britain is on the verge of entering a conflict in Syria in which its political and military strategy is based on wishful thinking and poor information. British air strikes in Syria will be too few to make much difference to Isis, but are important because they signal Britain’s entry into what may be a long war.
In one crucial respect, David Cameron’s approach is similar to that which saw Britain fight two small but unsuccessful wars in Iraq and Afghanistan since 2003, in both cases without an effective local partner on the ground. Similarly in Syria, Britain will be at the mercy of events which are being shaped by the numerous other players in the conflict, all of whom have their own highly contradictory agendas.