of air bubbles and wreckage. Gladiolus was credited with destroying , but post-war re-evaluation found no U-boat attacked that day, and attributed U-65s destruction to the attack by Douglas the previous day. In June 1941 HX 133 came under attack; Gladiolus was detached from escorting OB 335 to join as reinforcement. On 24/25 June, after midnight, she sighted , and attacked. She attempted to ram, but slowed to avoid major damage, and U-71 dived away. Gladiolus then launched five attacks, using 30 depth charges altogether, and was joined by , which launched another six. U-71 was severely damaged, and surfaced to try to escape on the surface; Gladiolus and Nasturtium opened fire, scoring hits on U-71s conning tower. Gladiolus claimed a kill for this, and was credited with sinking U-71, but the boat escaped to base. On 26/27 June in early hours, attacked the convoy, and was sighted by Nasturtium. She attacked and was joined by and Gladiolus. Altogether the three corvettes launched 50 depth charges; U-556 was forced to the surface as Gladiolus dropped a further three depth charges; the corvettes then opened fire at point-blank range, hitting U-556s conning tower. Her captain, Wohlfarth and the crew abandoned ship, and the boat sank before she could be secured. In September 1941 Gladiolus was involved in the battle for SC 42. Under major attack, SC 42 lost 15 ships in two days, for the destruction of one U-boat. Numerous escorts were drafted in as reinforcement; on 11 September Gladiolus arrived with EG 2, led by Douglas. SC 42 was stalked for a further five days, losing two more ships, though the destroyers of EG 2 were able to sink another U-boat. This was, after SC 7, the worst convoy loss in the North Atlantic during the war. Following this, Gladiolus was reassigned to the Newfoundland Local Escort Group, led by . In October 1941 she was part of the escort for SC 48, during which battle Gladiolus was lost. Fate Gladiolus was lost in October 1941 whilst escorting SC 48. At the time, she was under the command of Lieutenant Commander H. M. C. Sanders. British sources record Gladiolus separated from SC 48 on the night of 15/16 October. At 2130 Empire Heron was hit, and Gladiolus was detached to chase down the attacker and search for survivors. At 2200 she signalled she had picked up one man, and was