Hi My Fair Lady
I've just taken the magnifying glass to my photograph. Despite the fact that some of the inscription is unclear, I can confirm that the photo does, indeed, include your uncle's grave. Please contact me so that I can email a copy of the photograph to you.
I hope that you can bear with me until the weekend on this, as I should like to try and enlarge the section containing Dick's memorial so that, hopefully, you will be able to see as much of the inscription as possible.
I would imagine that this photograph belonged to somebody who had a connection with whoever it was that was being buried at the time. The fact that Dick's memorial is visible in the photograph is purely coincidental - but great news for you and for me. I now know where the photograph was taken and can date it to some time after 7 February 1930!
As to whether or not your uncle would have received any medals, I really cannot say. If you can locate a museum for the Royal Artillery, they may be able to help you, or at least point you in the right direction.