Those U-boats that still had torpedoes following the attack on Convoy SC7 were now ordered to join up with U-47, commanded by Gunther Prien. He had spotted another Liverpool bound convoy, this time unescorted. Although the Royal Navy, alarmed at the losses to SC7 and aware of the probable danger to HX79 sent ships to the scene, they were no deterrent to the night time attack by the Wolfpack. A further 12 ships were now sunk, with no loss to U-Boats. In total 28 ships had been sunk from the two convoys on the 18th and 19th October 1940, the worst loss of ships in a 48 hour period for the entire war.
The British reviewed their tactics and soon tightened up their procedures so that convoy escorts worked as a team. Meanwhile Gunther Prien enjoyed a further propaganda boost for the Germans. His tonnage sunk may well have been exaggerated to push him along. He was now awarded the Oak Leaves to the Knights Cross.