Troops "going over the top" at the start of the Battle of the Somme in 1916.

Staged scene of Canadian soldiers leaving their trench for a raid during the Battle of the Somme.

British wounded near Bernafay Wood, July 1916

German trench in Delville Wood, September 1916

British infantry attacking near Thiepval, 7 August 1916

Cheshire Regiment trench near La Boiselle, July 1916

1st Battalion, Lancashire Fusiliers, near Beaumont Hamel

Public Schools Battalion at "White City", near Beaumont Hamel

Vickers machine gun crew wearing gas helmets, near Ovillers July 1916

New Zealand infantry in the Switch Line, September 1916

British infantry advancing during the Battle of Morval, September 1916

Mark I "male" tank, Battle of Thiepval Ridge

Men of the Royal Warwickshire Regiment, their rifles stacked nearby, lying exhausted in the grass in a rear area

Entrance to a German Officer's dugout showing the protection over its doorway and its depth

A mass of men, horses and equipment at Mailley-Maillet

The Virgin hanging from the Church of Notre Dame in Albert.

The badly shelled main road to Bapaume through Pozieres, showing a communication trench and broken trees

A ration party of Royal Irish Rifles in a communication trench early in the battle, possibly on 1 July.

Remains of a German machine gun post near Guillemont, September

Stretcher bearers retrieving a wounded soldier during the Battle of Thiepval Ridge

View from a kite balloon looking from Bécourt toward Bapaume, July

The ruins of Pozières, August

Pozières plateau, looking towards the "Old German" lines, August

"Gibraltar" bunker at Pozières, August

View from Centre Way trench near Pozières towards Mouquet Farm, August

Australian 6th Brigade returning from Pozières, August

Road to Pozières, August

Sausage Valley, August

trenches

Explosion of the mine beneath Hawthorn Redoubt, 7.20 am

Aftermath of the Hawthorn Redoubt mine

Gordon Highlanders advancing near Mametz

Tyneside Irish Brigade advancing near La Boiselle

German trenches in Delville Wood

Terrain Map: Delville Wood

Positions on 14 July 1916

Positions on 15 July 1916

Positions on 16 July 1916

Positions on 18 to 20 July 1916

Delville Wood in 1916 and 2009 and Albert statue on church of Notre Dame in 1916 and 2009

8-in howitzers firing near Mametz, August 1916

A shell being loaded into a 15 inch howitzer

A Holt tractor hauling a 9.2 inch Howitzer to a forward area

A 9.2 inch gun in action during the battle of Albert

A dump of 18 pounder shell cases used in the bomdardment of Fricourt.

British gas cylinder release against Montauban, June

British infantry attack plan for 1 July. The only Allied successes came in the south at Mametz and Montauban and on the French sector.

The British 21st Division attack on Bazentin le Petit, 14 July 1916. The area captured by 9.00 am is shown by the dashed red line.

Progress of the Battle of the Somme between 1 July and 18 November.

"Mametz, Western Front" by Frank Crozier (1919)

"Mouquet Farm, Pozières" byFred Leist (1917)