I have been unable to find service records for Harry, and do not know when he was born so his identity remains a mystery.
I now believe I have discovered Harry's identity.
I have confirmation from Harry's grandaughter Gladys that he served in the Manchester Regiment in WW1.
Harry was born in 1875 the son of Samuel and Mary Ann Bagnall
From the Manchester Evening News, September 29th 1915
Harry Bagnall listed as wounded 28-9-1915
Harry Bagnall again listed as wounded 30-8-1916