United Kingdom votes in most unpredictable election in decades

By Guy Faulconbridge and Andrew Osborn LONDON (Reuters) - British voters get to decide on Thursday who they want to rule the world's fifth-largest economy in a tight election that could yield weak government, propel the United Kingdom towards a vote on EU membership and stoke Scottish desire for secession. Prime Minister David Cameron's Conservatives and Ed Miliband's opposition Labour Party have been neck and neck in opinion polls for months, indicating neither will win enough se