i think the fulmar. arrived just in time, when other allied naval fighters were either lacking the necessary performance, or were insufficiently developed to do the job that was needed. And in the kind of war that britain found itself after the fall of france through to the end of 1942, the britah absolutely had to put their fleet in harms way to deny the enemy the freedom of action they needed to conquer all the parts of the workd that they needed. i dont think it is any overstatement to claim that the fulmar prevented the axis from winning the war, or forcing the allies into a very tenuous situation