In April, she was deployed for the aborted Operation Myrmidon. After the operation was cancelled she joined another heavy escort, led by the same three ships, for convoy PQ 14 and QP 10. Later in April, she was yet again deployed in such a rôle, for convoys PQ 15 and QP 11. However, this time PQ 15 was also escorted by the battleship of the United States Navy, which had been deployed to British waters after many Royal Navy capital ships had been lost.