FILE - In this April 30, 1976 file photo, Conservative Party leader Margaret Thatcher holding up five one-pound notes during a speech in Finchley, North London. "Every time you spend five pounds," she said, "the Government owes one to creditors abroad." The pound has endured a similar devaluation since the country voted to leave the European Union in a referendum in June 23, 2016. (AP Photo, File)