Add 2421 C Campbell
CWGC headstone in the churchyard of Ellel St John but I could not find him on your database. Died 6 September 1915 serving in the Royal Garrison Artillery.
Rosemary Lim commented
A page has been created for Gunner Charles Campbell https://livesofthefirstworldwar.org/lifestory/7695213 .
Many thanks for reporting.