The master of the Belgium Prince Henry Hassan was taken inside the U55 at the time of the attack. I have found his name on the Commonwealth War Graves web site, his name is listed at Tower Hill.

However, in a book called "War Under the Red Ensign 1914-1918 pub 2010 on page 175 it is claimed Hassan was released from a camp at the end of the war.

Can anyone throw any light on this saga? many thanks