Prime Minister David Cameron listens to Secretary of State William Hague address supporters during an...
British Prime Minister David Cameron (L) listens to Secretary of State William Hague address supporters during an event in Lincoln, Britain April 24, 2015. Cameron courted English voters on Friday ahead of a tight UK-wide election, promising to create a separate rate of income tax for England and to give English lawmakers greater powers if re-elected. REUTERS/Toby Melville