On the Western Front... Despite increased Luftwaffe attacks a total of 64,429 men are evacuated from Dunkirk. However, German planes sink four destroyers and damage five more as well as several of the Channel ferries and other ships, which form the backbone of the evacuation fleet. The RAF sends eight large patrols to give cover but most of the damage is done in the intervals between them. On the ground the Germans increase their efforts, breaking the defensive perimeter along the canals at Bergues and forcing retreats in other sectors as well. During the night the British authorities decide that the air attacks have made the evacuation too dangerous to continue by day.
In Norway... The British and French tell the Norwegians that they are about to begin their evacuation. They have delayed giving this information on the grounds of security but by doing so they have encouraged the Norwegians to openly resist the Germans, which can only be costly when the Allies leave.
http://www.medairwar.com
