Young female voices

chattered and laughed as the team emerged from the mess hut, donned their field caps then headed toward the anti-aircraft battery. All carried the khaki gas-mask packs that thumped awkwardly on their hips with the weight of the steel helmets, but only the first five wore the red lightning flash badges on their shoulders and they made for the octagonal shape on the ground beyond the arc of the guns. They wore the insignia of the Ground Location Unit; the new wonder device that they hoped would turn the initial success of Germany's aerial invasion.