Western Approaches
"Witch" remained in commission after the United Kingdom entered World War II in September 1939, and on 3 September 1939 she was assigned to the 15th Destroyer Flotilla at Rosyth for the defence of convoys in the North Sea steaming along the east coast of Great Britain. In October 1939 she was transferred to the Western Approaches Command for convoy escort duty in the Western Approaches and North Atlantic Ocean.