Private T/243201 (T/1684), 1st/5th Battalion, The Queen’s (Royal West Surrey Regiment). Formerly 200307, East Surrey Regiment.

Details about his death in Mesopotamia are from the regiment War Diaries. Original pages are in PDF format from:

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June 1917

7th 5.30 p.m No. 7534 Pte E. A. BLOCK, "A" Coy was accidentally drowned in the river whilst bathing.

8th 9.15 a.m. A Court of Inquiry was convened by order of the 
Commanding Officer to enquire into & report on the circumstances under which 
No. 7534 Pte E. A. BLOCK was drowned on the evening of 7.6.17

President Major F. K. BRAY
Members   Capt  P. R. WHITTINGTON
          Lt.   L. F. CRANE

8th (contd) The court reported that no blame could be attributed to anyone, 
Pte BLOCK having been drawn into deep water by the current.

Commonwealth war Grave Commission entry