 When Owen enters the dining room in Battersea power station, the  large black and white mural behind him is "Guernica" by Pablo  Picasso. (The image can also be seen drawn on the wall of the tunnel  which Theo and Kee use to escape in the rowboat.) The painting was  Picassos expression of disgust over the Nazi bombing of Gernika,  Spain during the Spanish Civil War, which killed an estimated 1600  civilians.