Like many propaganda films, "The Lion Has Wings" does not tell the whole truth, but there are many elements of truth in it. The use of radar as a defensive measure was not mentioned, since it was still a secret. However, the bombing raids were shown first being reported by spies then confirmed by the Observer Corps, a tactic that was actually occurring as part of Britain's defensive measures. The film also shows Luftwaffe bombers trying to attack London, but being completely turned back by barrage balloons, which in reality had little effect on the raids. The use of RAF fighters intercepting and attacking enemy bombers at night was not feasible at that point. These errors or misinterpretations added to other lofty claims that Britain had sufficient aircraft in production and was quite ready to fight to counter the overwhelming numbers of Luftwaffe raiders; all purposeful exaggerations were intended to bolster morale.