Sensitive rock superstar David Gray is set to play a huge open-air gig in Londonís Trafalgar Square. The virtual pigeon play yard has undergone a £25 million overhaul and to celebrate that fact, the city of London is throwing a big-ass free party. Joining Gray on the stage on Saturday, August 31, will be trip-hoppers Morcheeba, with a third band to be named later. Did I mention the gig is FREE? Well, it is to the 10,000 peeps that called up and successfully had tickets earmarked for them. The rest of us will just have to settle with taking the bus around the Square over and over in order to hear bits and pieces of the sets.