What is the setting of the story (time and place)?

The setting of the story is the countryside outside of London, during WWII.

ONCE there were four children whose names were Peter, Susan, Edmund and Lucy. This story is about something that happened to them when they were sent away from London during the war because of the air-raids. They were sent to the house of an old Professor who lived in the heart of the country, ten miles from the nearest railway station and two miles from the nearest post office.