BRISTOL, ENGLAND - JULY 23:  In this photo illustration a man looks at Twitter on a iPad of tweets from Clarence House on July 23, 2013 in Bristol, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge.  (Photo by Matt Cardy/Getty Images)