The Fourth National ministry was formed by Neville Chamberlain on his appointment as Prime Minister of the United Kingdom on 28 May 1937. As a National Government it contained members of the Conservative Party, Liberal Nationals and National Labour, as well as a number of individuals who belonged to no political party.
On 3 September 1939 Chamberlain requested the formal resignations of all his colleagues and reconstructed his ministry in order to better face the Second World War. For the new ministry see Chamberlain war ministry.
Chamberlain is best known for his appeasement foreign policy, and in particular for his signing of the Munich Agreement in 1938, conceding the Sudetenland region of Czechoslovakia to Germany. He said it brought "peace in our time" and was widely applauded. He also stepped up Britain's rearmament program, and worked closely with France. When in 1939 Hitler continued his aggression, taking over the rest of Czechoslovakia and threatening Poland, Chamberlain pledged Britain to defend Poland's independence if the latter were attacked. Britain and France declared war when Germany attacked Poland in September 1939.
Chamberlain wanted to focus on domestic issues. He obtained passage of the Factories Act 1937, designed to better working conditions in factories, and placed limits on the working hours of women and children. In 1938, Parliament enacted the Coal Act 1938, which allowed for nationalisation of coal deposits. Another major piece of legislation passed that year was the Holidays with Pay Act. The Housing Act 1938 provided subsidies aimed at encouraging slum clearance, and maintained rent control. Chamberlain's plans for the reform of local government were shelved because of the outbreak of war in 1939. Likewise, the proposal to raise the school-leaving age to 15, scheduled for implementation on 1 September 1939, could not go into effect.