Also in attendance was Duff Cooper, the Minister of Information, who needed the war cabinet's advice on what to tell the public about the fall of Calais, the Belgian capitulation and the seriousness of the BEF position as they retreated to Dunkirk. Churchill wanted the seriousness to be emphasised but, for the sake of relatives, was against the publication of details (e.g., the names of regiments in Calais). He forbade any speculation about the outcome of Operation Dynamo until it became clear if it would succeed or fail. Churchill also said that he personally needed to make a full statement in Parliament but thought it might be another week before the situation had cleared sufficiently to enable him to do so. The war cabinet agreed that Cooper should proceed along the lines suggested by Churchill.