How many different ways did Britain have of defence against bombing during WW2?

As part of our History about World War Two, we have been discussing the Blitz and the children have been finding out about how people could defend themselves. We have also looked at a fascinating website about the bombs that hit London and the children have been interested finding out about the bombs that hit Sutton. You'll be pleased to know that no bombs fell on that site that is now our school!