The armistice of 22 June 1940 provided that northern and western France would come under German occupation. Walter Rudin, a Jew from Vienna, and a fellow Austrian were together in France at the time. Rudin later wrote in his brief autobiography that because it took some days for the German occupiers to get into place, British military ships remained in French ports for several days after the armistice was signed, taking on volunteers to serve in the continuing war against Germany. That is how Rudin joined the British navy, in which he served until the war was over.
What is the more complete story of the British ships in France after the signing of the armistice?