I see Jenny Elizabeth has long since stopped looking at Rootschat!
Anyway I have at last come across the names on that photo so I could help her
I have, in vain, tried to get at whether the photo is genuine or not. Can you imagine 10 spies saying, "lets get out class photo taken "
The whole episode of the shooting of the Cairo Gang is somewhat badly written up historically. Nobody appears to have made an objective study of which were British spies, and which were mistakes. Nobody has verified, as far as I know the men said to be in the photo with their actual photos.
It is rare to come across a descendant like the OP of this thread, and I really would like to contact her