Christmas Eve 1914, soldiers along the Western Front during the First World War did something extraordinary. They laid down their weapons, and ventured out of the trenches into No Mans Land to exchange holiday greetings and even play a game of Football. It was a spontaneous gesture of peace in the middle of a terrible war. This year marks the 100th annivesary of the Christmas Truce. We'll talk to Alan Cleaver who is in charge of Operation Plum Pudding, researching what happened on Christmas eve 100 years ago and collecting letters written by the men who were there. We'll talk to Alan Cleaver about his work and commemorations of the 100th anniversary of the Christmas Eve Truce.