From CWGC

Rank: Serjeant
Service No: 11159
Date of Death: 17/03/1920
Regiment/Service: Royal Garrison Artillery 121st Heavy Bty.
Awards: M M
Grave Reference: S.11.
Cemetery: MITCHAM (CHURCH ROAD) BURIAL GROUND

Forenames from Ancestry:

Ancestry.com. British Army WWI Service Records, 1914-1920 [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2008.
Original data: The National Archives of the UK (TNA): Public Record Office (PRO).