A man dressed in British union flag clothing promotes a souvenir shop in Piccadilly Circus in central London April 19, 2011.More than half of all Britons will watch Prince William marry long-time girlfriend Kate Middleton on April 29th, a poll conducted for Reuters showed. The royal wedding is expected to be one of the year's most watched events globally, with some estimating viewership as high as two billion people. The event will be streamed live on the internet via an official royal channel, the first British royal wedding to be covered this way.[Photo/Agencies]