At G7, Cameron keeps lid on press pack's 'Brexit' probing

By Kylie MacLellan ISE-SHIMA, Japan (Reuters) - In Japan, ostensibly to cover Prime Minister David Cameron's talks with other G7 leaders, travelling reporters had other things on their minds -- mainly next month's vote on whether Britain should ditch its membership of the European Union. With the June 23 vote looming, British "hacks" who had paid thousands of pounds to watch Cameron's every move in Japan and to try to quiz him and his team on "Brexit", were frustrated to be swept off to a Japane