The opposition Labour Party on Tuesday urged British Prime Minister David Cameron to release “every single communication” with his former communications director Andy Coulson and former News International executive Rebekah Brooks. Private email exchanges between Cameron and Brooks, a close personal friend, and Coulson, the former editor of the now-defunct News International tabloid News of the World, had been exempt from being released to the Leveson Inquiry, the parliamentary committee that was set up to investigate hacking at News of the World and other News International outfits. Sources said the private email exchanges are “embarrassing,” although Downing Street insisted the messages are “not relevant.”