A presiding officer (L) and poll clerk (C) drink a cup of tea while waiting for early morning voters at a polling station set up in a launderette in Headington outside Oxford on June 23, 2016. Millions of Britons began voting today in a bitterly-fought, knife-edge referendum that could tear up the island nation's EU membership and spark the greatest emergency of the bloc's 60-year history. / AFP PHOTO / ADRIAN DENNIS