The following may be of interest -
"On 7th. May when the fighting in Europe had already ended, a convoy was assembled for the north-east voyage up through the Pentland Firth, but this was a convoy with a difference. On ship and on shore the lights were blazing and at 2030 hrs the little group of five ships set out in an atmosphere of thanksgiving that at last it was all over. Rockets and flares were ignited, messages of goodwill exchanged between merchantmen and ships of the RN, impromtu parties, and prayers were shared by the men and women remaining on shore to celebrate the return of peace.
At 2300 hrs, two massive explosions were heard rolling in from the sea, and by midnight the ladies of the Methil Mission were once again at their appointed posts on the pierhead, in the kitchen, waiting for the survivors who had been picked up by other vessels in the Firth. There were 54 of them, from the 2878 t Avondale Park and the Norwegian Sneland I but they had left eleven shipmates behind, two British and nine Norwegian, and another was to die before the night was out. Many more were injured.
Germany's U-boat force had ended the war in Europe as it had begun it, with a totally unprovoked, unresisted, totally indefensible attack on people with whom they had no war. U-2336 (Lt Emil Klusmeier) sped away into the night and to surrender"
Source - The Red Duster At War, by John Slader.

Bill