From Ancestry

Name:                 Arthur James Block
Birth Place:          Mitcham, Surrey
Death Date:           21 Aug 1916
Death Place:          France and Flanders
Enlistment Place:     Kingston-on-thames
Rank:                 L Corporal
Regiment:             Duke of Cambridge's Own (Middlesex) Regiment
Battalion:            1st Battalion
Regimental Number:    G/13462
Type of Casualty:     Died of wounds

Source:
Military-Genealogy.com, comp. UK, Soldiers Died in the Great War, 1914-1919 [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2008.
Original data: British and Irish Military Databases. The Naval and Military Press Ltd.