need help to search for ANY information Sapper William Mills 11/09/1918

I am looking for : death notices, documents...about this sapper  
Sapper William Mills 65716
Royal Engineers 
Date of death : 11/09/1918 (19 years old)
Cemetery : BERTENACRE MILITARY CEMETERY, FLETRE, France

SDGW gives:

Born  Woking, Surrey

Enlisted   Guildford, Surrey

Place of Residence   Woking, Surrey

Service Number    65716

Cause of Death   Died

Place of Death    France & Flanders

Date of Death    11th September 1918

Royal Engineers (141st A.T. Coy., R.E.)

The Soldiers Effects Register records ‘accident’. At the time of his death the 141st AT Coy RE were working on water supplies at Bailleul, Berthen. Godewaersvelde and Steenvoorde. Sadly the war diary for the unit makes no mention of the events which led to his death.

His service record available on FMP details the circumstances of his death.

This clipping courtesy FindmyPast also gives useful detail:

Thank you to all of you and don't hesitate to send me new information 

1 hour ago, Augustin said:

Thank you to all of you and don't hesitate to send me new information 

Could you tell us your interest in this man?

Charlie

I had the opportunity to visit the BERTENACRE military cemetery.
I noticed for the first time that there were sappers buried in this cemetery and I tried to trace their history. 

Augustin

on this document we see his name

My great grandfather was a sapper in the same unit . I dont know what he looked like.  William Robert Warr , he was killed Aug 2 1917