Tentative identification by Chris Burge of Mitcham War Memorial website.
This might be George H.A. Fisher, a Rifleman (Service no. 5492) who enlisted on 11 May 1914 in the Rifle Brigade (5th Battalion, Prince Consort’s Own) and was discharged at Winchester on 25 April 1918.
Excerpt from The National Roll of the Great War
Fisher, G.H.A., Rifleman, Rifle Brigade
He volunteered in August, 1914, and the following year saw service on the Western Front, wher ehe took part in many engagements, and was wounded in the fighting at Ypres. During 1916 he was again in action, and was seriously wounded at Mailly-Mailly in July, as a result of which he was discharged on account of wounds, in April 1918.
He holds the 1914-15 Star, General Service and Victory Medals.
102, Burn’s Road, Harlesden
No firm connection to Stockwell has yet been established. Fisher does not appear to be listed in the Commonwealth War Graves Commission database.