A meeting between Chamberlain, Halifax, Churchill and David Margesson, the government Chief Whip, led to the recommendation of Churchill, and, as a constitutional monarch, George VI asked Churchill to be Prime Minister and to form an all-party government. Churchill's first act was to write to Chamberlain to thank him for his support.
Churchill had been among the first to recognise the growing threat of Hitler long before the outset of the Second World War, and his warnings had gone largely unheeded. Although there was an element of British public and political sentiment favouring negotiated peace with a clearly ascendant Germany, among them the Foreign Secretary Lord Halifax, Churchill nonetheless refused to consider an armistice with Hitler's Germany. His use of rhetoric hardened public opinion against a peaceful resolution and prepared the British for a long war. Coining the general term for the upcoming battle, Churchill stated in his "finest hour" speech to the House of Commons on 18 June 1940, "I expect that the Battle of Britain is about to begin."