Men of Royal Irish Rifles resting in a communication during the opening hours of the Battle of the Somme, 1 July 1916.
Wounded British soldier showing shrapnel damage to his steel helmet caused near Hamel on the Somme Front in December 1916.
Munition workers in a shell warehouse at National Shell Filling Factory No.6, Chilwell, Nottinghamshire in 1917.
Soldiers of 'A' Company, 11th Battalion, the Cheshire Regiment, occupy a captured German trench at Ovillers-la-Boisselle on the Somme.
Wounded men being tended in a trench near Beaumont Hamel on the morning of the initial assault, Battle of the Somme, 1st July 1916.
Officers and men of 26th Divisional Ammunition Train (Army Service Corps) playing football in Salonika, Christmas 1915.
Travoys Arriving with Wounded at a Dressing-Station at Smol, Macedonia, September 1916
The remains of Thiepval chateau on the Somme battlefield, 28 September 1916.
Roll Call of the 2nd Battalion, The Seaforth Highlanders, on the afternoon of the first day of the Battle of the Somme near Beaumont Hamel. The insignia on their sleeves indicates that they were part of the attacking force.
Men of the Lancashire Fusiliers cleaning a Lewis gun in a trench near Messines in Belgium during January 1917.
A team of stretcher bearers struggle through deep mud to carry a wounded man to safety near Boesinghe on 1 August 1917 during the Third Battle of Ypres.
The dawn sky is lit by the bombardment before the assault on Thiepval, 15 September 1916, during the Battle of the Somme.
Three 8-inch howitzers of 39th Siege Battery, Royal Garrison Artillery (RGA), firing from the Fricourt-Mametz Valley during the Battle of the Somme, August 1916.