Woolley,
thank you for sharing the snowball photo, it is a lovely item. You can bet the poor chap with the camera "got it" once the photo was taken. Except from the lad on the right who is glued to his cup of char.
On the original Squadron photo, I dedect an 'X' by the man extreme right on the wing.
Was this your father? - and is he in the snowball group?
Cheers
Dave