Men of the East Yorkshire Regiment crossing newly won ground at Frezenburg in 1917 during the Third Battle of Ypres.
Wounded British soldier showing shrapnel damage to his steel helmet caused near Hamel on the Somme Front in December 1916.
Men of the 8th Battalion, East Yorkshire Regiment going up to the line near Frezenberg during the Third Battle of Ypres, 1917.
Tank F4, 'Flirt II', at the Tank Driving School at Wailly on 21 October 1917, in training for the Battle of Cambrai.
Munition workers in a shell warehouse at National Shell Filling Factory No.6, Chilwell, Nottinghamshire in 1917.
Soldiers of the Lancashire Fusiliers cleaning a Lewis Gun. On the left can be seen the gas alarm horn and wind vane. January 1917 near Ploegsteert.
Wounded men being tended in a trench near Beaumont Hamel on the morning of the initial assault, Battle of the Somme, 1st July 1916.
A raiding party of the 10th Battalion, Cameronians (Scottish Rifles) waiting for the signal to go. John Warwick Brooke, the official photographer, followed them in the sap, into which a shell fell short killing seven men. Near Arras, 24 March 1917.
The remains of Thiepval chateau on the Somme battlefield, 28 September 1916.
A member of the Women's Royal Air Force (WRAF) working on the propellor of an Airco DH9A in 1918.
Infantry from 103rd (Tyneside Irish) Brigade, 34th Division, advancing to attack La Boisselle on the morning of 1 July 1916, the opening day of the Battle of the Somme.
Mark I 'Male' Tank of 'C' Company that broke down on its way to attack Thiepval on 25 September 1916 during the Battle of the Somme.
SE.5 aircraft of No.32 Squadron at Humieres airfield near St Pol, 6 April 1918.
Men of the 2nd Australian Division in the front line at Croix du Bac, near Armentieres, 18 May 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.
A Handley Page O/400 bomber of No. 207 Squadron being moved by a Clayton tractor at Ligescourt, 29 August 1918.
Men of Royal Irish Rifles resting in a communication during the opening hours of the Battle of the Somme, 1 July 1916.
Officers of No.3 Squadron, Australian Flying Corps, examining the machine guns from the wreckage of Baron Manfred von Richthofen's Fokker Triplane at Bertangles, 22nd April 1918.
A female worker operates a winch at a shipbuilding yard on the River Clyde in Scotland during the First World War.
Air Mechanics of the Women's Royal Air Force (WRAF) working on the fuselage of an Avro 504 aircraft during early 1919.
Men of the Wiltshire Regiment advancing to the attack through the wire, Thiepval, Somme, 7 August 1916.