Women munition workers finish small arms cartridges in Small Arms Cartridge Factory No.3 at Woolwich Arsenal, London, during the First World War.
Members of the Women's Army Auxiliary Corps tending British war graves at Abbeville, 15 September 1917.
Women ambulance drivers compete in a tug-of-war event at a Royal Air Force sports event at Rang du Fliers on 25 August 1918.
Australian soldier in the trenches at Croix du Bac, near Armentieres, using a wind direction indicator to assess the likelihood of a gas attack, 18th May 1916.
Trench cookers of the 191st Siege Battery, Royal Garrison Artillery, in a position near the village of Wancourt, 29 April 1917.
Young British recruits at a British Army base camp at Etaples in France, 16 July 1918.
HM King George V, on Wytschaete Ridge in Belgium on 4 July 1917 during a tour of the Western Front.
The Mark I 'Male' tank 'C19' 'Clan Leslie' in Chimpanzee Valley preparing for the advance on Flers during the Battle of the Somme, 15 September 1916.
Members of the Women's Royal Air Force (WRAF) on parade in 1918.
British horse lines at Suvla Bay during the Gallipoli Campaign in 1915.
Five ambulance drivers of the First Aid Nursing Yeomanry (FANY) at Calais in January 1917.
British troops in the ruins of Beaumont Hamel on the Somme battlefield two weeks after its capture on 13 November 1916.