Mr John Gilligan returns to Belmarsh Magistrates' Court in London tomorrow to resume his appeal against extradition on charges relating to the murder of the journalist, Veronica Guerin.
The complexity of the case means he may spend many more months in prison here.
In his absence yesterday, Woolwich Magistrates' Court remanded him in custody to appear tomorrow to continue his appeal on an abuse of process technicality.
Mr Gilligan has already spent 11 months in prison on drug trafficking charges but his trial, due to begin earlier this month, was dramatically aborted after extradition papers were served on him in London and he immediately began an appeal.
His appeal is based on the length of time he has spent in Belmarsh Prison since his arrest at Heathrow airport last October.
He was arrested as he attempted to board a flight to Amsterdam allegedly with £330,000 concealed in his suitcase.
Nearly a year of legal wrangling followed as the prosecution counsel applied for vital evidence to be released by gardai, and Mr Gilligan appealed against the drug trafficking charges at every turn.
Only days before his trial was due to begin on September 8th, gardai investigating Ms Guerin's murder moved to apply for his extradition on 18 charges, including murder, illegal possession of firearms and drug trafficking.
A civil case against him, for the recovery of the £330,000 found at Heathrow airport, is continuing in Britain despite the warrants for his extradition.
In court tomorrow, Mr Gilligan's counsel, Ms Clare Montgomery QC, will press the abuse of process argument vigorously. But it remains unclear whether the court will be swayed by legal argument that it has the authority to hear an abuse of process appeal.
If it decides it does not, the appeal will then proceed to the High Court. The process could take many months and, privately, prosecution counsel believe Mr Gilligan faces an uncertain future at least until next year.