from the long long trail site
1/4th Battalion Yorkshire Regiment
August 1914 : in Northallerton. Part of York & Durham Brigade, Northumbrian Division.
18 April 1915 : landed at Boulogne.
14 May 1915 : formation became 150th Brigade, 50th Division.
16 July 1918 : reduced to cadre strength and moved to Lines of Communication.
16 August 1918 : transferred to 116th Brigade, 39th Division.
6 November 1918 : demobilised.
for a potted history of the division see here
http://www.1914-1918.net/50div.htmThe 1/4th was a territorial force battalion, it is possible he was a part time soldier prior to the war
I can see no specific action the battalion were involved in on that day, but i hold no details on them