A new opinion poll for tomorrow's Sunday Business Post shows a 4% drop in support for Fianna Fáil.

The findings comes in the wake of the publication of the Anglo tapes over the past week in the Irish Independent.

The Sunday Business Post/ Red C monthly tracking poll shows a sharp reversal in the trend of recent months where Fianna Fáil has been steadily rebuilding support.

The poll shows Fine Gael at 28%, up to two points, Labour at 12%, up one point.

Fianna Fáil is at 22%, down four points on last month, with Sinn Féin at 17%, a rise of one. “Others” at 21% remain unchanged.

A second Sunday Times Behaviour and Attitudes poll has Fine Gael at 27%, Labour at 7%, Fianna Fáil at 24%, Sinn Fein at 16% and “Others” at 26%.

The difference in Fianna Fáil support between both polls is likely to reflect the fact the Sunday Business Post poll was conducted between last Monday and Wednesday at the height of the political fall-out from the Anglo tapes.

The Sunday Times poll commenced a week before the tapes emerged and finished on Monday, just as the controversy over the tapes was starting.