The Social Democrats doubled their support over the past month, a new opinion poll suggests, while Sinn Féin remains the most popular party.

The Ireland Thinks poll, for the Sunday Independent, was conducted on Friday - two days after Cork South West TD Holly Cairns became the new leader of the Social Democrats.

The poll suggests Sinn Féin's support has dropped by two points, and now stands at 29%.

It also suggests that Fine Gael saw a one point drop in support to 21%.

However, Fianna Fáil stands at 19% - up one.

The biggest change was for the Social Democrats, with the poll suggesting the party increased its support to 9% - up 5.

Green Party support is unchanged at 4%.

Both the Labour Party and Aontú dropped a point to stand at 3%.

People Before Profit / Solidarity is at 2% - down one.

Independents and others are unchanged at 10%.

Ireland Thinks interviewed more than 1,162 voters for their poll on 3 March.

The margin of error is plus or minus 2.9%.