I am just as confused, :-)
I am not sure who wrote the descripton or the date on the back, I think it was my aunt who wrote "uncle Alf and grandad" so I can only assume it was one of Georges children who wrote the description and date.
His son Alf, who I have cropped off the first photo, joined up in 1918 and served in the tanks.
I had suspected the photo was a momento of the two of them - just in case.
Perhaps things will become clearer when more records get released,and his area of deployment confirmed.
regards
John