she was released from the home fleet deployment off norway in may, and on 10 may took passage to dover to support the evacuation of allied personnel from belgium and the netherlands. she managed to complete the passage from scapa flow to dover in just 23 hours. she refuelled on 11 may and began patrolling off the dutch and belgian coasts. on 13 may, she embarked members of the dutch royal family at ijmuiden and carried them to safety in the uk. she returned to deploying out of harwich on 15 may, and on 27 may she deployed with , and to intercept german surface craft attempting to attack allied ships. she was then transferred to dover command to assist in operation dynamo, the dunkirk evacuation. on 28 may she embarked 866 troops from the beaches, and took on survivors from the coaster with "grenade" and and took them to dover. she made a second trip on 29 may, embarking 766 troops, and a third on 30 may, embarking 799 troops. a fourth trip followed on 31 may, when she embarked 909 troops, landing 440 at dover. 1 june saw her taking 746 troops back to dover, and her final run on 2 june brought 878 troops back to the uk. "codrington" was one of the few destroyers that had escaped major damage and was able to continue supporting operations after the evacuation had been completed.