The nurses' strike and the controversy over cost overruns at the National Children's Hospital appear to have had no impact on the ratings of the parties involved in the confidence and supply agreement, a new poll suggests.

Both Fianna Fáil and Fine Gael remain unchanged in the latest Behaviour and Attitudes poll for the Sunday Times, while Sinn Féin has dropped two points.

The poll puts Fine Gael is on 30% and Fianna Fáil on 26%.

Sinn Féin is down two points to 18%.

Labour has gained one point and is now on 5%.

The Greens, Independent Alliance and Solidarity/People-Before-Profit are all unchanged on 2% each.

The Social Democrats are unchanged on 1%.

The Socialist Party and Renua are each up one point to 1%, while Independents and other smaller parties are unchanged on 13%.

The survey was conducted from 31 January to 12 February when the nursing strike and cost overruns at the National Children's Hospital were prominent in the news.

The results are based on 910 face-to-face interviews with eligible voters and the margin of error is 3.3%.

The poll also shows a slight increase in satisfaction with the Government which is up one point to 35%.

Micheál Martin remains the most popular leader with a satisfaction rating of 43% - up one point since the last poll.

Satisfaction with Taoiseach Leo Varadkar is also up one point to 39%.

Mary Lou McDonald is down one point on a satisfaction rating of 39%, and Labour leader Brendan Howlin is up one point to 39%.