How did you come up with 'What is it Good For?'

Well I knew I wanted to make a sketch like comedy and my original idea was for the main character to misunderstand a broadcast and believe there was a zombie apocalypse. I wanted the film to have a deeper meaning, so I ended up changing it to the threat of nuclear war. It's relevant in todays society, and has darker undertones, masked with humor. Similar to how British society function under these threats. After some research, I decided to write the film around the government issued pamphlet 'Protect and Survive'.