British soldiers fire antiaircraft guns at a German observation airplane in Busigny, Nord, France.

A film on the development of air power. The sixth section battery 'F' antiaircraft service of the British Expeditionary Forces in action in Busigny, Nord, France during World War I. The battery in action against a German observation airplane. Two antiaircraft guns are mounted on World War I vintage trucks which are jacked up on blocks and are leveled with leveling screw jacks. Soldiers standing nearby.