I'm confused!
I'm very grateful for your input and research Regorian and ShaunJ but are we now saying "my" William Cartwright is not the man in the portrait? Or does the uniform indicate it may be him, with the information under the photo relating to Captain William Cartwright, who died in Guernsey?
There are just so many William Cartwrights and I really get confused with Military stuff
Thanks ShaunJ for the info about the TNA reference numbers. I did wonder myself if the reference was incorrect but then forgot to follow it up by seeing if I could order WO25/752B