What kind of government did England have during World War II?

During World War II, Great Britain had a constitutional monarchy and a parliamentary system in place.  The role of Parliament in Great Britain was to make primary legislation.

The political leader of the country was the Prime Minister.  During World War II, there were three Prime Ministers of Great Britain.  When the war began, Neville Chamberlain was the Prime Minister.  He resigned and Winston Churchill took on his role.  Churchill was the most famous Prime Minister from this period of time.   He was very involved in the British war effort during his time in office.  Clement Attlee became Prime Minister after Churchill, and he was in office for less than two months before VJ Day and the end of the war.  The monarch of Great Britain, who at the time was George VI, usually did not make political decisions.  Instead, he relied heavily on the decision-making of the country's Prime Minister.