BRITAIN-MARKETS-WORLD-CURRENCY-BREXIT

A cashier displays multiple denomination US dollar and British pound Sterling bank notes for a photograph inside a currency exchange store in central London on October 4, 2016. - The pound slumped to a 31-year low against the dollar Tuesday, sinking to $1.2740 -- its lowest level since 1985 -- on concerns over the timing and terms of Britain's planned exit from the European Union, traders said. Britain's currency also struck a fresh three-year low point against the euro, while the drops helped pushed London's benchmark FTSE 100 stocks index up to a 16-month high beyond 7,000 points at the open. (Photo by Niklas HALLE'N / AFP) (Photo by NIKLAS HALLE'N/AFP via Getty Images)