Latest polls suggest that the United Kingdom could vote to leave the European Union in the June 'Brexit' referendum. Saxo's John Hardy says this is already being felt in sterling - in both EURGBP and GBPUSD. He warns that there is further risk to the downside for GBP if the odds increase for a brexit. But he also notes that in the longer term it could get contrarian if EURGBP moves too much higher.