Elaine Moore's family learned late last night that she was in custody in Holloway women's prison, in north London.
They had spent most of the evening making frantic telephone calls in an attempt to find out where she was being held.
Earlier calls to prisons including Holloway, Belmarsh high security prison and Woodhill Prison, near Milton Keynes, where Ms Moore was held in custody before being released on conditional bail on August 5th, had yielded no information.
Her mother, Ms Cathy Moore, said the family was "given the runaround by the prisons".
After yesterday's hearing Ms Cathy Moore , described the British criminal justice system as "scandalous" and "disgusting".
"We were assured this would be a two or three-minute hearing. This case is a nightmare. Nothing prepared me for the nonsense that went on."
Ms Moore was speaking after her daughter was returned to custody yesterday following complications arising from the conditions for bail sureties set by the Old Bailey on July 31st.
Ms Moore said she wanted politicians from all parties in Ireland and Britain to lobby the Lord Chancellor, Lord Irvine, "to do something about this situation".
Her daughter, who recently lost her job as an executive at a computer servicing company in London following her arrest in July, had been subjected to "sheer persecution", including being held in an all-male prison and strip-searched four times a day.
The family was "just disgusted with the whole episode", she said.
Accompanied by her partner and her son, Rory, Ms Moore described the remand hearing at Belmarsh Magistrates' Court as "nonsense - the armed police don't view her as a threat. Her solicitor has not even been notified of where she has been sent."
Fine Gael MEP, Ms Mary Banotti, who pledged £30,000 as part of Ms Moore's bail, said last night she found it "extraordinary" that sureties which were suitable for the Old Bailey should be found unsuitable in a magistrate's court. "I find it quite alarming that such a turnaround can happen . . . especially when the fact is that someone was on holiday," Ms Banotti said.
Bail sureties were "a technicality and nothing to do with Elaine's guilt or innocence" and she said a "big effort" would be made to find alternative sureties.