Fianna Fáil leader, Michaél Martin, speaking to Kfm, says Simon Harris needs to "correct the Dáil and he needs to apologise to the Dáil"
Mr. Martin has called for the immediate release of all documents pertaining to the National Children's Hospital
It's been revealed that the Health Minister was aware of a possible 400 million euro over-run in the cost of the hospital in August last year.
But Leo Varadkar wasn't told about it until nearly 2 months later.
The Taoiseach has played down concerns about the impact of the rising costs on other major spending projects.
Mr. Martin was a guest on this morning's edition of Kildare Today with Clem Ryan.
The interview, in full, which also touched on the nurses pay dispute and Brexit, is available here