Sterling's fall shows EU referendum 'no parlour game' - Osborne

By Estelle Shirbon LONDON (Reuters) - Leaving the European Union would be a "profound economic shock" for Britain and this week's drop in the value of its sterling currency drives home the real-world consequences of the "In-Out" debate, Chancellor of Exchequer George Osborne said on Friday. Britain is gearing up for a June 23 referendum on whether to stay in or withdraw from the 28-member EU, and the pound has fallen to seven-year lows against the dollar this week due to worries about what "Brex