AA guns open fire on single plane, which is later shot down by fighters.
Flotta: Heavy anti-aircraft battery 'F1' machine-gunned by German plane. No casualties.
Flotta: 99 LAA Battery report that fluted nails were dropped by German plane from c. 3500ft. When examined, they are thought to be fragments from a plane "as they cannot be considered as an effective missile." No bombs dropped in 1st raids. More raids expected - enemy aircraft off Wick was sending detailed reconnaissance and weather reports to Germany."