Mario Draghi and Janet Yellen poised for EU referendum fallout

Central bankers from ECB and US Federal Reserve warn they are on high alert over outcome of vote, which still appears too close to call

The two most powerful central bankers have warned that they are on high alert for financial and economic fallout from the EU referendum, amid signs that the result of Thursday's vote still hangs in the balance.

On a day that saw Monday's big rises in shares and the pound halted by polls showing the race too close to call, Mario Draghi, the president of the European Central Bank, said he was prepared to use every available tool to protect the eurozone if the UK decides to leave.