Source: 18th Battalion Nominal Roll, April 1915. Note that Nominal Roll spells name at “Fliton”.
Find-A-Grave: Note that his name is listed as Mark William Flitton. The date of death and his spouse’s name correlate.
Reverse of 1914-1915 Star with Private Flitton’s name and regimental number. 
On the left, the 1914-1915 Star. Center, War Medal. Right, Victory Medal.
War Diary of the 18th Battalion CEF 