Support for the No camp in the EU Fiscal Treaty debate is up – but the majority are still in favor of acceptance.

A new opinion poll for the Sunday Business Post newspaper indicates that 47 percent will vote yes next month.

The Red C opinion poll shows the treaty will be passed when it goes before the Irish electorate on May 31st.

Some 35 of those polled say they will vote No, up two points, while 18 percent are undecided, according to the poll.

Sunday Business Post political correspondent Pat Leahy has warned the Yes camp against complacency with polling still a month away.

“This poll will steady nerves in Government Buildings a little bit, because some recent polls suggested that there was much greater weakness in the Yes vote than we see today,” said Leahy.

“In a nutshell, what we see in this poll is that the Yes side are in a good position but that the campaign will decide the outcome of this referendum.”