An unanswered Dáil question about meetings between a junior minister and the last remaining National Broadband Plan bidder was the result of an administrative oversight, a Government Department has said.

It follows an official complaint made by Social Democrats TD Catherine Murphy after her question seeking details of Minister Pat Breen's engagements with David McCourt was not answered last week.

The Department of Business Enterprise and Innovation said tonight the mistake was brought to its attention this morning and a full answer was issued.

"Minister Breen approved the content of the reply in respect of himself on Thursday and it should be noted that there was no additional information in the reply in respect of Minister Breen other than what was already in the public domain," a department spokesperson said.

The department has apologised to Ms Murphy for the delay.

Earlier, Ms Murphy described the delay as a highly unusual occurrence.

Labour's Sean Sherlock said tonight that Mr Breen should now make a Dáil statement detailing his meetings with David McCourt.

"It is time for Fine Gael to come clean on all the meetings that have taken place with the lead bidder on the (NBP) tender," he said.

It is almost a fortnight since Denis Naughten was forced to resign as Minister for Communications after he admitted to having a number of private dinners with Mr McCourt which he had not previously disclosed.

An invitation for one of these dinner meetings was passed on to Mr Naughten by Mr Breen.

Last week, Taoiseach Leo Varadkar told the Dáil that Mr Breen's role in passing on the invitation was not wise but not a resigning matter.