Dutch voters went to the polls on Wednesday to vote on the European Union's constitutional treaty amid indications of a high turnout and with a late opinion poll suggesting there may not be a landslide No that many have predicted.

The Interview NSS survey for Dutch television on Tuesday showed Yes with 46 per cent to No's 54 per cent, on a turnout of 46 per cent. A poll on Monday had 60 per cent against the treaty, immediately following the French referendum.