Plans by Minister for Communications Denis Naughten to refer the proposed takeover of Celtic Media by Independent News & Media (INM) to the Broadcasting Authority of Ireland (BAI) were relayed to Denis O’Brien two months before they were made public, according to court documents.

Mr Naughten’s intentions, outlined on a private call with a PR executive acting for INM, were among information shared in nine communications that the State’s corporate watchdog has claimed may amount to “inside information” and potentially a breach of stock market rules by the company’s former chairman Leslie Buckley.

Director of Corporate Enforcement Ian Drennan made his claims as part of his application to have inspectors appointed to investigate the company, which is being opposed.

He argued in an affidavit filed after a year-long investigation into the firm that Mr Buckley shared information with Mr O’Brien in eight emails and one text from March 2016 to January 2017. This was done “in advance of that information being available to INM’s other shareholders”, potentially breaching Market Abuse Regulations.

Mr Heneghan told the then chairman that the Minister told Mr Ó Neachtain, a former government press secretary, the previous afternoon during a telephone call that, based on advice from his officials, he planned to refer the takeover to the BAI “because of the overall ownership of print and broadcast titles by DOB [Denis O’Brien].”

I have not seen the alleged contents of the affidavit that you refer to and, as this matter is before the courts, I cannot comment Mr Heneghan told Mr Buckley the Minister’s decision was “to be treated as highly confidential”.

The Drennan affidavit shows Mr Buckley forwarded Mr Heneghan’s email to Mr O’Brien 31 minutes later.

Mr Naughten did not formally refer the later abandoned merger to the BAI until January 2017.

In response to questions, the Minister said: “I have not seen the alleged contents of the affidavit that you refer to and, as this matter is before the courts, I cannot comment.”

Mr Ó Neachtain told The Irish Times that Mr Naughten would have known he was working for INM. He said he was asked by the company to find out the Minister’s view of the suggested merger after the Competition and Consumer Protection Commission’s decision.

“I ascertained what his reaction would be and I told the client. What they did with it [the information] after that is a matter for them,” he said.