When Thomas tells Arthur to look at himself, Arthur throws the vases in front of the mirror on the ground. In the next shot, when Thomas leaves the room, the vases are standing in front of the mirror again. When Thomas re-enters the room, the vases can be seen in the background standing closer to each other.
Churchill reads aloud a letter from Tommy, stating he fought at Verdun; Churchill also asks who else in the room fought there, to which a few men raise their hands. In actual fact, British forces were not at Verdun and opened up the Somme largely to relieve French forces. Verdun was solely a French effort.