The Supreme Court has refused to let five TDs join businessman David Hall's appeal, as part of his challenge to the Government's payment of promissory notes.
The three-judge court has ruled it would only be appropriate for the Deputies to become part of the case at this late stage in exceptional circumstances.
TDs Clare Daly, Luke Flanagan, Mick Wallace, Joan Collins and Catherine Murphy applied to join David Hall's challenge at the appeal stage after the High Court found the businessman did not have the necessary legal standing to challenge the lawfulness of the promissory notes, as he is not a Dáil deputy.
The court ruled today there would have to have been exceptional circumstances, such as the risk of an injustice, to allow the deputies to become part of the case at this late stage.
The TDs can still bring a separate challenge to the notes, an option not ruled out by Luke 'Ming' Flanagan who said they were prepared to "exhaust all avenues".