Wounded men being tended in a trench near Beaumont Hamel on the morning of the initial assault, Battle of the Somme, 1st July 1916.
Wounded British soldier showing shrapnel damage to his steel helmet caused near Hamel on the Somme Front in December 1916.
Working party of British troops on muddy ground near Bernafay Wood, Somme, November 1916
Workers at the Royal Arsenal, Woolwich, London, leave from the Fourth Gate, by Plumstead station, May 1918.
Women war workers range shell cases in the New Case Shop at the Royal Arsenal, Woolwich.
Two women munitions workers with a truck load of shell cases in the New Case Shop at the Royal Arsenal, Woolwich during the First World War.
Two women munition workers operate a shell case forming machine during the First World War at the New Gun Factory of the Royal Arsenal, Woolwich, London.
Two men of the 12th East Yorkshires wearing snow suits leaving their snow-covered trench on daylight patrol. Arleux Sector, 9 January 1918.
Two Irish Guardsmen going up a communication trench with supplies. Elverdinghe, 30 July 1917.
Two cooks of the First Aid Nursing Yeomanry (FANY) outside their hut with trays of food at a military hospital at Calais in January 1917.
Troops supposedly "going over the top" at the start of the Battle of the Somme in 1916. In reality the photo was taken during a training exercise.
Troops of the 4th Battalion, Worcestershire Regiment (29th Division) marching to the trenches. Acheux-en-AmiÃÂ©nois, Somme, 27 June 1916.
Troops advancing across the Somme battlefield. Photo taken from an aeroplane.
Trench cookers of the 191st Siege Battery, Royal Garrison Artillery, in a position near the village of Wancourt, 29 April 1917.
Tommy the tortoise, the pet of Mrs Dudley Beresford, was injured by shrapnel during the barrage of a German air raid on London on 29 September 1917.
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.
Their Majesties the King and Queen, Queen Alexandra, Sir Deighton Probyn and Petty Officer Ernest Pitcher, V. C., H. H. at the private view of the Exhibition of Naval photographs at Princes Galleries, Piccadilly, 21st July 1918.
The two 'Women of Pervyse', Mairi Chisholm and the Baroness de T'Serclaes driving their motor ambulance through the ruins of Pervyse.
The road to Guillemont viewed from Waterlot Farm, 1916. In the words of the official history it was 'straight, desolate, and swept by fire.'