The British pound has fallen sharply after two opinion polls for The Guardian newspaper indicated support for a British exit from the 28-country European Union in next month's referendum.

In both polls, one conducted by phone and the other online, the "leave" campaign was up 52 points to 48.

The polls, released Tuesday, jolted markets which have downplayed the possibility of a vote for so-called Brexit in the June 23 vote. British bookmakers still think a "remain" vote is still the more likely outcome but there's been a modest narrowing over the past few days. The bookies think a vote to remain is around 75 percent likely.

Within minutes of the release of the latest poll results, the pound was down a cent at $1.4550.