© Image IWM (HU 63277B); © Image IWM (HU 63277B)
British troops advance to the attack through a cloud of poison gas as viewed from the trench which they have just left.
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Men of the 8th Battalion, East Yorkshire Regiment going up to the line near Frezenberg during the Third Battle of Ypres, 1917.
A British soldier stands besides the grave of a comrade near Pilckem during the Third Battle of Ypres, 22 August 1917.
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.