"Broadway" arrived at Belfast on 24 October 1940, where she joined the 11th Escort Group, Western Approaches Command, with whom she engaged in escorting numerous convoys. On 9 May, while escorting convoy OB 318, she was involved, with the destroyer "Bulldog" and the corvette "Aubrietia", in the capture of German submarine "U-110" between Iceland and Greenland. On the previous night, the U-boat had crept in to attack OB 318, but was prevented from surfacing by the strong destroyer escort. The submarine continued to shadow the Allied ships until early in the afternoon watch when she launched three torpedoes from periscope depth. "Broadway" and her fellow escorts promptly counterattacked and forced her to surface where she surrendered. Unfortunately the prize sank while in tow to port, but not before her captors had recovered documents of great value and importance to the Allies' cause – including an intact Naval Enigma machine. "U-110" was commanded by Korvettenkapitän Fritz-Julius Lemp who had made the first kill of the war by sinking the liner SS "Athenia" on 3 September 1939, the day the United Kingdom declared war. Lemp was lost with 14 members of his crew when "U-110" sank, but a war correspondent, 4 officers and 28 men were rescued.