Memories of a prisoner of war

My dad was a machine gunner who was badly injured whilst fighting in the Middle East. When the group he was with retreated it was decided to leave the badly injured behind in the hope the German army would treat them. His comrade, who was uninsured, volunteered to stay behind to surrender. My dad was taken to hospital and ended up in a prisoner of war camp. He was forced to work in a coal mine and was again injured in an explosion. Until the day he died he had tiny pieces of coal embedded in his face and body.