My great-grandfather Thomas Murray was killed on the third day of the Somme and is commemorated on the Thiepval Memorial, Pier and Face 3 C and 4 A:http://www.cwgc.org/find-war-dead/casualty/1546811/MURRAY,%20THOMAS

I visited there many years ago with my family. A couple of years ago, I traced his last hours and contacted his old school (he was a teacher like me). The school archivist there was organising a school memorial service for the centenary of WWI so it was good timing, and he invited my auntie - Thomas Murray's grand-daughter - to attend as a guest of honour. 
I sent the archivist an old staff photo taken just before the war, and identified several masters that also died in the war. Most interestingly, JLWH Abell was also a captain in the same battalion and died in the same assault at the same time. The archivist was astonished by this and it turned out the two masters ran the junior school together, so were real pals. 

Account of last battle of Capt T Murray and Capt J Abell:

Here is the actual engagement in which Thomas Murray died. His battalion (11th Cheshire) was attached to the 75th Brigade, 25th Division. Here is an account:

Moved from Toutencourt to Hedauville during night (30/6). To Martinsart Wood (1/7). Moved forward via Black Horse Bridge and assembled for attack south of Thiepval during night. Attacked on right (3/7) - leading waves noted in War Diary as passing over No Man's Land in perfect order - heavy machine gun fire later brought assault to a standstill about 50 yards from German first line - line after line of troops were mowed down.' Official History of The Great War records some 60 men drifted to the right and joined Highland Light Infantry in the Leipzig Salient. Commanding Officer killed while going forward with reserve company. Withdrew to start positions. War Diary records 20 officers and 657 other ranks going into trenches, just 6 and 350 coming out during night (4/7).

Tim Layton