On 3 September 1939, Neville Chamberlain, Prime Minister of the United Kingdom, reconstructed his existing government so as to be suited for the Second World War.The most dramatic change to the ministerial line-up saw the return of Winston Churchill as First Lord of the Admiralty.The War Cabinet included Chamberlain, Hoare, Chancellor of the Exchequer Sir John Simon, Foreign Secretary Lord Halifax, Churchill, Secretary of State for Air Sir Kingsley Wood, Minister for Coordination of Defence Lord Chatfield, Lord Hankey (as Minister without Portfolio), and Secretary of State for War Leslie Hore-Belisha.Oliver Stanley replaced Hore-Belisha in January 1940 while Chatfield left the war cabinet in April 1940.The government ended on 10 May 1940 when Chamberlain resigned and was succeeded by Churchill who formed the War Coalition.