Art on the Underground

The current poster display on the northbound Bakerloo Line platform at Oxford Circus is the nicest I've seen in the 30-plus years I've been catching trains there.  Along the entire length of the platform are gigantic blow-ups of colourful photos apparently shot by the general public on their iPhone 6's.  Not only is it lovely to look at, but it's also pretty effective as an advertising campaign - a seasoned Nokia user for two decades, even I am now considering switching to an iPhone...!