The story behind Sainsbury's WW1 Christmas

Although the events shown in the Sainsbury's Christmas ad are fictional, they tried to make the details as accurate as possible. Everything from the insignia on the men's uniform to the depth of the trenches is based on historical fact. In this short documentary Sainsbury's talk to the experts who advised, interviewed the grandson of a soldier who was there, and hear first-hand accounts from both sides. Footage: Sainsbury's/YouTube