How did the UK defend itself during the war?

Answer 1

Britain set up the first radar system on the south coast of England where they also set up spotter groups to identify activity across the channel. They developed "Big Wing" Through commander Mallory of the RAF which was a strategic set of defence air fights based around the country that could be called on to meet at specific locations and take on German bombers (this was the battle of Britain). The Home Guard was formed and contrary to popular belief these were quite well trained men who were taught a vast range of sabotage techniques in the even of invasion. Coastal areas were armed with large gun emplacements many were actually wooden structures which the Germans though were really heavy artillery. In the channel itself it was fully mined at a range of depths which was found to have been very effective when in 2009 2 Uboats were found on the sea bed.