Troops of the 4th Battalion, Worcestershire Regiment (29th Division) marching to the trenches. Acheux-en-AmiÃÂ©nois, Somme, 27 June 1916.
A captured German pillbox nicknamed 'Gibraltar' in the ruins of Pozieres, Somme, 20th September.
A well concealed and revetted trench, between two-lines of trees. Gommecourt, given up by the Germans in March 1917.
A barbed wire gate in a trench system to form a block against raiders at Cambrin, 16 September 1917.
Officers of 12th Royal Irish Rifles wading through mud in a trench, Essigny, 7 February 1918.
Battle of Loos; British attack on the Hohenzollern Redoubt. Photograph shows a cloud of smoke and gas in the centre and on the left. 1915.
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.
A Handley Page O/400 bomber of No. 207 Squadron being moved by a Clayton tractor at Ligescourt, 29 August 1918.
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.
Gladys Wilburn of the Womens Royal Naval Service (WRNS) using a boat-hook to push her motor boat, the BALMACAAN, away from the shore at Southwick harbour, 1918.