The poster and its history have been the subject of several articles in the "quality" UK newspapers and today there was a story and some great photos in the Guardian, and an interview with one of the Guardian's editors here. It's a message that should resonate with most all of us. Panicking and freaking out about the economic climate isn't going to help anyone or anything. Calm and reasoned thinking will get us through this. The economic situation will turn around when it does and not a moment sooner.
Please, keep calm and carry on.