Looking at the 1911 census, the Swarland Terrace Harbottles seem to be the only family of that name in Chevington. They also seem to be all accounted for in the cemetery records apart from James.
His entry in the war dead in FindmyPast suggests that he enlisted first in the Northumberland Fusiliers (13967).
I tried a trawl through the newspapers but the archive has only got as far as 1916
Some day..