It is understood there was great disappointment when Howlin announced last Monday that he would not put his name forward. As many as five TDs are believed to have contacted the Wexford deputy asking him to change his mind.

There are conflicting reports as to whether such contacts were made on an individual basis or by a group of TDs. But it is understood Howlin stressed that his decision was final.

Howlin's supporters believe he could have won the leadership contest, although they accept that it may have been difficult for him to re-enter the race having been so emphatic about his decision.

There is now a view in the party that Eamon Gilmore will become leader-elect next Thursday. Dublin North-East TD Tommy Broughan remains a potential challenger but the feeling in the party is that he will not force a contest.

Even if a challenger does emerge in the coming days, the momentum behind Gilmore's campaign is regarded as unstoppable.

The real contest will be for the deputy leadership, with Jan O'Sullivan enjoying an early edge over Joan Burton.

While Burton has a higher national profile and serious credibility, having held her seat against the odds in Dublin West, O'Sullivan's campaign has received the backing of some influential figures in the party, including Emmet Stagg and Willie Penrose. Acting leader Liz McManus, who yesterday announced she would not be standing in either of the leadership contests, became the latest TD to endorse O'Sullivan's candidature.