Faulty intelligence was the component that was mostly responsible for the failure of "Adlertag." While the gap between the British and Germans was not yet wide in this regard, the British were starting to gain a decisive lead in intelligence. The breaking of the Enigma machine and poor "Luftwaffe" signals discipline allowed the British easy access to German communications traffic. The impact of Ultra on the Battle of Britain is a matter of dispute, with Official Histories claiming there was no direct impact. Whatever the truth, Ultra, and the Y service in particular, gave the British an increasingly accurate picture of German order of battle deployments.