Munition workers painting shells at the National Shell Filling Factory No.6, Chilwell, Nottinghamshire in 1917.
A busy howitzer shop at Coventry Ordnance Works. Men and women work together as several gun barrels are transported overhead by pulleys.
Officers verses other ranks football match played by members of the 26th Divisional Ammunition Train near the city of Salonika, Christmas Day 1915.
A group of dog handlers stand with their dogs at the British Army kennels near Etaples, 20 April 1918.
A sister and a matron from Queen Alexandra's Imperial Military Nursing Service during the First World War.
A female munitions worker is lifted into the barrel of a 15-inch naval gun manufactured at the Ordnance Works, Coventry, during the First World War, in order to clean the rifling.
Sopwith F1 Camel, single-seat scout.
BE2c, two-seat reconnaissance aircraft, used by the Royal Flying Corps (RFC) during the First World War.
Still from the British documentary film 'The Battle of the Somme'. The image is part of a sequence purportedly showing British soldiers moving forward through wire at the start of the Battle of the Somme, 1 July 1916.
Still from the film "The Battle of the Somme" allegedly showing British troops advancing at the start of the battle on 1 July 1916. It is now accepted that this scene was staged for the camera at a training school behind the lines.
Ammunition limbers of 35th Field Battery, Royal Field Artillery, passing a corner of the shattered Delville Wood, Somme, 17th September 1916.
Carrying wounded across the battlefield under shell fire, Battle of Ginchy, Somme, 1916.
2nd Battalion Gordon Highlanders marching to the trenches along Becordel-Fricourt Road, Somme, October 1916.
Working party of British troops on muddy ground near Bernafay Wood, Somme, November 1916
Troops outside their dug-outs in Bazentin-le-Petit, Somme, July 1916.
An advanced water supply point on the Mametz Road near Fricourt, Somme, July 1916.
The Black Watch marching back along the Fricourt-Albert road headed by their pipers. Somme, August 1916.
Old German trench occupied by British troops. View from Albert-Pozieres road over Ovillers, Somme, September 1916.
A Sergeant Major of the 16th Irish Division having a breakfast meal by a wheatsheaf. The Amiens - Albert Road, 25th August 1916.
Battle of Bazentin Ridge, 14-17 July 1916. Soldiers digging a communication trench through Delville Wood.
Soldiers waiting by a travelling field kitchen for their dinner, Aveluy, Somme, November 1916.
British troops unloading flour from ships and loading into railway trucks. Calais, March 1917.
British troops unloading flour from a ship on to steam wagons. Calais, March 1917.
A portrait of four smiling Canadians, as they await treatment at a Casualty Clearing Station, Duisans, 3 September 1918.