With less than a month to go to the referendum on same-sex marriage, the latest poll in the Sunday Business Post says 72% plan to vote 'Yes', against a 'No' vote of 20%.

However among 'Yes' voters, one in three still have doubts about their intended vote.

1006 voters were questioned between Monday and Wednesday last week for the Red C poll, which also showed a drop in support for the government parties.

Michael Brennan, Politcal Correspondent for the Sunday Business Post, said Sinn Féin have come out as resilient as ever