What exactly is this message, displayed on the London Underground? Is it a come-on from a tonier paper--The Times, perhaps? A pitch to get off dead-tree communications altogether, and follow The Guardian online? No, as the fine print makes clear, it's a plea from the Mayor of London and Transport for London to avoid subway clutter by disposing of your reading matter in an appropriate recycling receptacle: Newspapers left on the Tube can jam doors and cause delays to your journey. Take your newspaper with you or put it in the bin to to be recycled.  ...