What does the detail on the medal card i.e. "clasp and Roses" refer to? Could that be some detail about the VC and its ribbon and clasp etc.?
The Long Long trail says this
" Clasp to the 1914 Star
A bar clasp inscribed "5 Aug. to 22 Nov. 1914" was given to all those who qualified for the 1914 Star and who served under fire. Since the same ribbon is used with the 1914-15 Star, holders of the 1914 Star were permitted to wear a small silver rosette on their ribbon when the decoration itself is not worn. On the medal index cards this is usually noted as the "Clasp and Roses" or "C&R" .It was necessary to apply for the issue of the clasp. "
I did try looking for a War Diary for the Royal Garrison Artillery on The National Archives site but I came up blank. You have to try different search terms.
On the medal and Award Roll it only gives the application for the Clasp and Roses.
He has the whole page to himself and it is headed 8th Divisional Ammunition Column RGA
Reference to the Clasp and Roses gives a date 14 April1921 = so the date he applied for the C and R? This one comes up using his first initial and surname.
There is a separate entry on the Medal and Award Roll for the Victory and British medals but nothing there you don't already know. This one comes up using his first full name and surname