Mr Danny McNamee had been the victim of "real prejudice" at his trial 11 years ago, his barrister claimed yesterday. Mr Michael Mansfield QC told three judges in London on the second day of Mr McNamee's appeal against conviction for conspiracy to cause explosions that vital information was deliberately withheld by the prosecution.
One of the complaints made yesterday by Mr Mansfield about the conduct of Mr McNamee's 1987 trial at the Old Bailey was that he was subjected to unfair cross-examination.
In his appeal, Mr McNamee claims that the Crown had painted a false picture of him as the master bomb-maker behind the Hyde Park blast which killed four members of the Household Cavalry and seven horses in 1982.
Mr McNamee (38), from Crossmaglen, south Armagh, who was sentenced to 25 years' imprisonment, was recently released from the Maze Prison in Northern Ireland under the Belfast Agreement.
Mr McNamee, who was present in court again yesterday for the hearing before Lord Justice Swinton Thomas, Mr Justice Garland and Mr Justice Longmore, has eight grounds of appeal.
Mr Mansfield has told the judges that the basis of the appeal is that "the picture painted by the Crown during the trial was a false picture".
Material suggesting the falsity of that picture had been kept from Mr McNamee at his trial and at his failed appeal bid in 1991.
Mr McNamee's case was referred back to the Court of Appeal by the Criminal Cases Review Commission after inquiries into a number of issues, including disclosure of evidence at the time of his trial.