Hi I'm Dave, new to the site
I've been researching the history of 175 brigade for a few years, that photo is from my website https://sites.google.com/site/175brigaderfa/, It is of my Grandfathers battery which was A/175 and was taken in November 1918. Bert Strappini was a member of D/175, (which was the 4.5" howitzer battery), If I can be of any help, the website has all the details from the war diaries, or contact me here. I have a better resolution photo, as I have the original, but obviously not much help to you, as a different battery, and after Bert was killed. I have visited his grave as part of my travels, but didn't take photos.
Regards
Dave