[3] The group commenced convoy escort duties in April 1942, in the critical mid-ocean section of the North Atlantic route, operating between Londonderry and St John's Newfoundland.
In February 1943 a depleted B2 under temporary command of Cdr Proudfoot escorted Convoy SC 118.
This convoy came under attack by wolfpack Pfeil and lost eight ships for three U-boats destroyed in one of the hardest fought battles of the campaign.
A series of uneventful convoys followed, as the U-boat arm withdrew from the North Atlantic after Black May, a state of affairs which continued until the end of the year.
[5] No warships were lost from the group, which accounted for three U-boats destroyed and two others damaged, and shared in the destruction of three others, in its 2-year career.