Opening up a new pizzeria in the capital these days means having to bravely pit yourself against the likes of sourdough veterans Franco Manca, Homeslice’s super-sized slices ... Neapolitan pizza ...

To the casual observer, it is just a photo of a man holding up a smiley face - an image used hundreds of millions of times a day in messages across the world to say "happy". But this smiley face ...