Warfare: Mr Robertshaw captured the 24-hour stint in the trench on camera for a book he wrote
Reality: Troops are seen in a trench in France during the First World War
Soldiers emerge from a trench and go over the top into battle during the First World War
With not a soul in sight, the peace and tranquility of these rural landscapes comes through loud and clear in a gallery of beautiful images.
Yet, nearly 100 years ago, these same serene scenes played host to some of the bloodiest and most violent battles of World War One in which 10 million soldiers died.
Scars of battle: Haunting picture of a landscape near Verdun, France still shows the pockmarks and craters made in the Great War almost 100 years ago
Eerie relic: British photographer Michael St Maur Sheil's picture of a World War I observation post near Hebuterne, south of Dunkirk
Haunting: The Fort de Douaument - a defence near Verdun, France which saw one million casualties in the Great War - from Mike St Maur Sheil's collection
Shell shock: Lochnagar Crater at the Somme as it is today. The picture is part of a collection of World War One landscapes which still bear the signs of war damage
The big bang: The detonation of buried British mines that formed the Lochnagar crater. The blast was heard 160 miles away in London in 1917
Blast damage: This image from within the crater gives a sense of its depth and the force of the explosion which created it