Fianna Fáil Leader Micheál Martin has accused the Taoiseach of "misleading the Dáil" over his contact with Anglo Irish Bank.
Today's Sunday Independent has published details of emails from Anglo's chief finance officer Matt Moran in which he said that Enda Kenny - who was then leader of the opposition - rang him twice in November 2008 to brief him on Fine Gael and government strategy.
Micheál Martin said that the revelations are a 'very serious development' and said the Government's criticism of Fianna Fáil's "collusion" with Anglo now has a "stench of hypocrisy".
Mr Martin said the Taoiseach needs to clarify his contact with Anglo.
"I think he essentially mislead the Dáil and more serious than that I think he seems to be trading inside information with the bank at a very critical time in terms of the banking system," he said.
"And he seemed to be in possession of information that he was passing on even before the shareholders of that bank were
"So I think there a lot of serious questions that he needs to answer
"He was very quick to point the blame at others I think he should apply the same standards to himself and he should make a very strong personal statement clarifying the extent and nature of his contact with Anglo Irish Bank."