Haydn was educated at Rotherham and Templeborough, then became employed by the Brightside and Carbrook Co-operative Society. He enlisted on 9th November 1914, and was embodied into the R.A.M.C. (T.F.) - 3rd West Riding Divisional Field Ambulance. He was 23 years and 5 months old at the time. On 11th January 1917, Haydn embarked at Southampton with the 2/3rd West Riding Field Ambulance, then disembarking at Havre the next day, entered the war in France on 12th January 1917. On 21st June, he was admitted into No 49 Casualty Clearing Station suffering from Albuminuria. He was evacuated back to No 10 General Hospital in Rouen via No 3 Ambulance Train, and eventually back to the UK. By the 15th November, he had recovered and was posted to Blackpool Base Depot, who sent him back to France as part of a group of reinforcements. After arriving, he was posted to serve with 111th Field Ambulance in the field on the 24th. Haydn was killed at Villers Faucon, near Peronne, and was buried where he fell. He was the eldest don of James Hurst and Clara (third daughter of George Oxspring of Southey Manor) Biggin of 45 Daniel Hill Street, Walkley, Sheffield; and the husband of Dorothy Elizabeth (daughter of William Henry Fowler) - married on 17th July 1915 at St Helenís Church, Treeton. They had one son.