British 146th Brigade retreated to Namsos, Norway; the brigade had thus far suffered 19 dead, 42 wounded, and 96 missing. British 148th Brigade's defense line at Tretten Gorge in Norway suffered a heavy artillery barrage in the morning, an attack by light tanks in the early afternoon, and a surprise mountain troops attack from behind the lines; they began to retreat northward at 1900 hours, strafed by German aircraft in the process; the 148th Brigade had thus far suffered 705 killed, wounded, or missing. Near Oslo, British aircraft conducted a raid on German-controlled airfields.
