quote:
Originally posted by http://www.eyewitnesstohistory.com/ultimatum.htm
At 9:00 on the morning of September 3, Sir Neville Henderson, Britain's ambassador to Germany, delivered an ultimatum stating that if hostilities did not stop by 11 AM, a state of war would exist between Great Britain and Germany. Germany did not respond and at 11:15 on the morning of September 3, 1939 Prime Minister Neville Chamberlain went on the radio to announce to the British people that they were at war with Germany.
so it was at 11:15am I think
also I used this to search google with ( just incase you wondered how I got it)
"when was World War II announced Neville Chamberlain time am"