Wellington bombers fitted with devices which can explode sea bombs from the air.
Full title reads: "ANTI-MINE WELLINGTONS".
Various shots of the Wellington bomber planes being fitted with large metal hoops around the noses and wings at an air base in a desert. Shots of the Wellington bomber in flight - the large ring is charged with electricity and when flying over the sea it can explode magnetic mines set down by Germans.
(Mute & Track Negs.)