As intended by Ribbentrop, the narrow time limit for acceptance of the "final offer" made it impossible for the British government to contact the Polish government in time about the German offer, let alone for the Poles to arrange for a Polish plenipotentiary envoy to arrive in Berlin that night, thereby allowing Ribbentrop to claim that the Poles had rejected the German "final offer". As it was, a special meeting of the British cabinet called to consider the "final offer" and declined to pass on the message to Warsaw under the grounds that it was not a serious proposal on the part of Berlin. The "rejection" of the German proposal was one of the pretexts used for the German aggression against Poland on 1 September 1939. The British historian D.C. Watt wrote, "Two hours later, Berlin Radio broadcast the sixteen points, adding that Poland had rejected them. Thanks to Ribbentrop, they had never even seen them". On 31 August, Ribbentrop met with Ambassador Attolico to tell him that Poland's "rejection" of the "generous" German 16-point peace plan meant that Germany had no interest in Mussolini's offer to call a conference about the status of Danzig. Besides the Polish "rejection" of the German "final offer", the aggression against Poland was justified with the Gleiwitz incident and other SS-staged incidents on the German–Polish border.