German 181st infantry division begins reinforcing Trondheim, arriving in numerous transport planes, one conventional transport ship and 2 submarines operating as undersea troop transports.
British 148th Brigade under Brigadier Morgan arrives in Åndalsnes overnight with orders to advance 150 miles Northeast to Trondheim. However, Morgan has also received opposite instructions (directly from Chief of the Imperial General Staff General Ironside) to support the Norwegian troops currently to the Southeast defending the Gudbrandsdal and Østerdal valleys leading up from Oslo.
German troops moving North out of Oslo are held up by Norwegian forces in the village of Bagn in the district of Valdres, approximately midway between Oslo and Bergen. http://hem.fyristorg.com/robertm/norge/history_section.html
Operation Hammer, the proposed landings at Trondheim, suffers a further setback. Brigadier Berney-Ficklin is put in charge but he is injured when his plane crashes en route to embark at Scapa Flow.
British submarine HMS Sterlet disappears, either sunk by German anti-submarine trawlers UJ-125, UJ-126 and UJ-128 or striking a mine.