The Long Long Trail (
www.1914-1918.net) has this page:
http://www.1914-1918.net/koyli.htmWhich says:
2/4th Battalion
Formed at Wakefield on 30 September 1914 as a second line unit.
1 March 1915 : moved to Bulwell and attached to 187th Brigade in 62nd (2nd West Riding) Division. Moved in April 1915 to Strenshall and on in May to Beverley, going on in November to Gateshead, January 1916 to Larkhill and June 1916 to Flixton Park near Bungay. Moved again in October 1916 to Wellingborough.
Landed at Le Havre on 15 January 1917.
2/5th Battalion
Formed at Doncaster on 10 September 1914 as a second line unit. Record same as 2/4th Bn.
2 February 1918 : absorbed into 1/5th Bn
Details of the 62nd (2nd West Riding) Division here:
http://www.1914-1918.net/62div.htmThey took part in the following engagements in 1917:
The Operations on the Ancre ( 15 February - 13 March)
The German retreat to the Hindenburg Line (14 - 19 March)The first attack on Bullecourt (part of the Arras offensive) (11 April)
The German attack on Lagnicourt (part of the Arras offensive) (15 April)
The Battle of Bullecourt (part of the flanking operations round Arras) (3 - 17 May)
The actions on the Hindenburg Line (20 - 28 May)
The Cambrai Operations (Tank attack 20 - 21 November and the capture of Bourlon Wood 27 - 28 November)
And details of the battle/retreat:
http://www.1914-1918.net/bat17.htm