Bombing supports Daeshs propaganda that the west are cowards and without an appropriate follow-through/withdrawl plan this idea will flourish and find new support in the middle east.

It would be better for the Syrian people if we let Assad lead the fight and offer him lots of support. The Syrian people would prefer Assad restoring order to being bombed.

The UK Foreign Affairs Committee published a report saying there should be no British airstrikes in Syria without a coherent international strategy to both defeat ISIL and end the Syrian civil war.

The foreign affairs committee, consisting of elected members of parliament believe that the PM has failed to justify his case for intervention.

they have nothing to gain from it

The UK can't afford it, due to austerity measures and defence cuts

Bombs are indiscriminate, regardless how accurate, bombs will kill innocents as well as the intended.