Harold was born in Wolverhampton in 1893, the son of Amelia and John T. Bagley. By 1901, he was living with his widowed mother at 102 John Street, Bilston.
Harold enlisted with the 8th Service Battalion of the South Staffordshire Regiment (number 15456). On 14 May 1917, his name was listed in the Express & Star as having been wounded. Unfortunately, this information was incorrect, as he was killed in action on 15 February 1916. He is remembered at the Ypres (Menin Gate) Memorial in Belgium