Answer:
well there was a few ways firstly there were air raid sirens which alerted people that there were enemy planes around so they would go to shelters. some shelters were built in peoples garden others were built in the street lot of London's underground stations were converted to bomb shelters like aldwich and down street where the members of the cabinet could work while air raids were going on. there were special train carrying food to take to the people who were sheltering. as well as that children were evacuated from London to the countryside where threats of air raids were less alot of famous British novels are written about this situation for example goodnight Mr tom. another is blackouts which was At night all lights in London had to be switched off so the enemy could not find London the final thing was using gas mask everyone was given one to put on encase of a gas attack though it never came hope this helps some useful resources would be BBC history or the History Channel also book in your local library