One thing you will get is the date he entered a Theater of War. This helps to pinpoint his battalion. I checked on Ancestry, and the date is 25.4.1915; 2b Balkans. This means that he landed on the first day of Gallipoli along with the rest of the 4th battalion.
He has two cards, one for the issue of a Silver war Badge on his discharge. They are both on Ancestry, but one is a bit hard to find as the name is spelled Coldecott on the SWB one.
All the best,
In memory of
17239 R J Washington MM, TEM, 2nd & 8th btn WWI
7852 W Russell, 2nd & 9th btn WWI
J Davies, 1st btn WWII, POW at Tobruk
4197291 Pte F Sheridan, POW France 1940