Thank you for your interest folks. This is the best I can do at the moment, I will have to try and get the original back from my sister in law and rescan it.
I have absolutely no idea who he might be. I had one uncle killed in WW1 and certainly isn't him, my dad and my other uncle were both in the navy and survived the war. (obviously my dad did or I wouldn't be here!)
The only other person who it might be is Freddy Potts VC, but I don't think Freddy was in the artillary. I will have to look him up on Google again. He was a great mate of my dad's and a very brave man.
Whoever it was must have meant something to my dad for the photo to have been kept.
If I do not get any luck on here I might try the local press, but I am not a great fan of either of two locals.