Lofoten's Oil Tanks Fired by the British. During the brilliant raid on the Lofoten Islands carried out by British forces on March 4, 1941, 26 oil plants in the islands were completely wrecked. British soldiers are here standing by while some of the storage tanks burn furiously. The fish oil plant on the Lofoten Islands was one of the Nazis' biggest sources of glycorine for making explosives, for more than half of Norway's annual output of eight million gallons were produced there. The raid, which took the Nazis completely by surprise, robbed them of 50,000 barrels of oil, and the wrecked plant will take a long time to replace. Photo, British Official; Crown Copyright.