To compliment the Rifles Middle East impressions, below is descriptions of the Khaki Drill Frock issued to both British and Indian Armies in the period before and then during the Great War.
http://www.amazon.co.uk/With-British-Army-Holy-Land/dp/0554367505
http://www.firstworldwar.com/battles/suez.htm
http://www.1914-1918.net/suez.htm
http://www.naval-history.net/WW1Battle1502SuezCanal.htm
The Rifles remember those rifle battalions of the 54th (East Anglian) Division TF.
http://en.wikipedia.org/wiki/54th_%28East_Anglian%29_Infantry_Division
http://www.firstworldwar.com/battles/gaza3.htm
http://www.lighthorse.org.au/famous-battles/world-war-one/famous-battles-the-battle-at-beersheba