Denis O’Brien has named Declan Ganley as the client behind the dossier that he alleges was created and circulated to damage him and his telecommunications company’s reputation.

On Monday Mr O’Brien’s lawyers filed affidavits from Colm Keaveney, a former Fianna Fáil TD, and Johnny Fallon, a political consultant, in which the two men link Mr Ganley with Red Flag, the PR company that Mr O’Brien has been suing for alleged conspiracy and defamation since 2015.

The former TD has also alleged that Karl Brophy, Red Flag’s founder, arranged for a senior Department of Finance official to meet Micheál Martin, the Fianna Fáil leader, in 2015 to discuss a Dáil debate on the sale of Siteserv to Mr O’Brien. He also alleged that he was sent