A garda is facing a six-figure legal bill after the Court of Appeal upheld a decision by the High Court to refuse him the full cost of his legal representation at the Disclosures Tribunal.

Along with his costs for the Tribunal, the court ordered Keith Harrison also to pay costs for the High Court and Court of Appeal cases.

Mr Harrison's evidence to the Tribunal was variously described as "false", "evasive", "at times senseless", "nonsense" and "ridiculous".

The Tribunal found that the garda had made "the most damaging allegations" against An Garda Síochána generally, against the social work system and against individual gardaí and social workers.

The Tribunal also found that Mr Harrison and his then partner Marisa Simms persisted in these "damaging and hurtful allegations notwithstanding the fact that they knew they were untrue."

Tribunal Chairperson Mr Justice Peter Charleton said that a myriad of people "were blamed in the wrong" and a "staggering allegation" of social workers being manipulated by sinister forces had been made which had been "stressful and deeply hurtful for all of those wrongly accused."

All of Mr Harrison's allegations were found to be "substantially unfounded" and were rejected by the Tribunal.

A subsequent application by Mr Harrison for all his legal costs was also rejected by the Tribunal chairman but he was granted costs incurred up to and including the opening day of the tribunal hearings.

Mr Harrison appealed that decision to the High Court but lost and appealed again to the Court of Appeal.

In an 89-page ruling, Ms Justice Una Ní Raifeartaigh, Ms Justice Maurice Collins and Mr Justice Donal Binchy found the decision of the High Court was correct.

The three judges also dismissed all Mr Harrison’s 34 grounds of appeal and ruled that the Tribunal was entitled to its costs in the Court of Appeal and the High Court.