Hi Ken thankyou for that, having updated my files, I had noticed several boats were lost with the loss of a single crewman, and as a matter of curiosity I thought I would check and see if there were any interesting points of what ranks these unlucky men had. I have now identified 21 men and now names/ranks for all. There are two other boats, I have conflicting data as to numbers, these being U573 and U1210. Have you anything definate on casualties of these boats? Regards John