This is when you wish you could read the shoulder titles!!
I can make out "T RFA....." and T RAMC..." but as to where ....oooh errr!
Any time between 1908/9 and 1915...I agree that I can make out no post 1915 jackets either!
Just wish they had some belts, webbing or something else to date it.
It could be either a Summer Camp, with their RAMC medic, and a trumpeter...(not a bugle, as they must be mounted...A cavalry trumpet)
I can't make out a medal ribbon, but I can make out a gun layers trade badge, and a Regt Signaler.