Looking for Info About Pte Sidney James Harraway

Sidney James was my great-uncle, the youngest brother of my paternal grandfather William Robert Harraway.
He lived in West Ham, London, with his wife Edith. They had a daughter who sadly died in infancy.
Sidney James joined the Essex Regiment, and fought at the 3rd Battle of Ypres (Passchendaele), where he was killed. He has no known grave, and his name is recorded at the Menin Gate in Ypres.

This much I know. I would love to know more about Sidney James, either pre-WW1 or WW1. A photo or photos would be much appreciated. Also, if you have any info. about Sidney James' siblings or parents, that too would be appreciated.

Simon Harraway